Opus BT-C3100 Charger Review -- V2.2

[@jackk7116]

I've been researching this charger and it certainly seems to be great value for money. Thanks for taking the time to put this together :)

[@Lightsngear]

Jack K You're welcome. If you're interested in having one you can follow this link; shrsl.com/?~8jvy Even though it's already been discounted I have a coupon code you can try. It's OPUSBTGB, not sure if it's still valid, but it's worth a try! Cheers!

[@mydogskips2]

Nice review, it answers most of my questions and lets me know how I would use the charger, but if I could say just one thing. You are making a VIDEO review, so you should be able to do and SHOW us what you are saying. @9:45 you should remove the battery from slot 2 and actually let us see if the battery you inserted into slot 4 can, in fact, be charged at 1,500 mA current. I understand what you're saying, but there should be no reason you cannot show us what you are telling us as well if you are making a video.

[@doooofus]

thanks for the helpful review - a question for you though: i'm interested in buying one of these to capacity test my lithium titanate oxide cells, theyre 18650 sized but obviously not one of the supported chemistries listed on the charger... if the operating voltage range is 1.9-2.8v would i still be able to do capacity testing using this charger anyway? i would imagine the voltage range being lower than for the other supported chemistries might affect charge testing if the voltage doesnt go low enough to safely charge my cells, but surely i could still do discharge testing just to figure out the capacity?? cheers

[@Lightsngear]

Yes. I would say so. Thanks for the question ☺️

[@joyjosephiyana6220]

Thats what i call a very clear review, thank you.....

[@gixxerboy555]

@2:15 ...1 drop of oil on each slide can help... ;)

[@harrothepilot]

Just bought one of these to replace a well used Soshine V3. Loaded it up with 4 Panasonic based 18650's and set them at 1 amp each. The fan started after a while, and then would cycle, as it maintained internal temp. The fan could be heard, although quietly. The charger lessened its input as it crept up on 4.2V for each cell, back to around 100ma in each bay, and shut off completely at end charge. All four cells tested within .01V on my DMM. It doesn't look as nice as some other offerings on the market, but does that matter? Time will tell how it lasts. I notice some quite negative comments re that, but cant that be true of anything?? Nice one, so far.

[@Lightsngear]

Thanks for sharing! I've had mine since I did the video. I've used it extensively and have had no issues whatsoever. As you say...anybody can end up with something they're not crazy about. Hope the Opus works as well for you as it has for me :-)

[@stephenbruce8320]

Nice Review. I actually have one of these on order with Gearbest and can't wait for it to arrive. I am amazed at what this puppy can do and for me its about the testing and reconditioning of the batteries that interests me most.

[@Lightsngear]

Stephen Bruce You're absolutely right! Its functions remind me of the great NiMH chargers that were popular some years ago. I'm sure you'll enjoy it.

[@TheBladeX10]

Is it better than Xtar VP4 Plus Dragon? In terms of a pure raw charge quality. I'm asking because i know that more people are working on Opus, i'm thinking of a fact that many people manufactured it 🤔. Xtar is constant and always focused on making the chargers. What's your opinion/experience with? Thank you 🙂

[@dtrrtd774]

That's the first time I heard of the batteries referred to as N-I-M-H and N-I-C-D, I guess it saves a couple syllables from saying nickel metal hydride, but the usual Ni-cad is shorter. So it's a wash- ;)

[@booradley1065]

I think you just need to get over it.

[@strika71]

Thanks for the in depth review! Can this charge CR123 battery size (assuming it's rechargeable). I have a Sekonic light meter that uses these odd size batteries and they're quite expensive to continually replace, so would like to invest in a rechargeable CR123 and charge with this unit, if possible.

[@grandpixel]

best video review so far, thank you

[@alexandreesquenet3736]

Thanks great overview !

[@HawgNSonsTV2]

When are my AA rechargeable batteries junk? What reading will I see in the display?

[@Lightsngear]

You might need to define "junk". Nothing will happen negatively until they reach a point where they simply won't charge. Any cheap (no name) NiMH's that I have, even when at very low voltage, have charged without a problem. It might show "err" if a battery can't be charged, but I'm not able to verify it.

[@netowork3d]

Xtar VC4 vs Nitecore D4 vs Opus BT-C3100 ....the best ?

[@Lightsngear]

The "best" is what you think offers you the best bang for your buck. Among the 3, for me...would be the Opus.

[@mamadouamadou9708]

Thanks for the efforts you putting in to make these Videos for others. Will this allows you to check the true capacity of these 18650 batteries? If not which one would you recommend to check 18650 true capacity.

[@Lightsngear]

Thanks for the comment! Yes, when using the discharge/test feature of the unit, you can get a capacity reading which I believe is pretty accurate.

[@billywhizzy]

Some users have mentioned that this charger is capable of displaying the battery internal resistance under one of the modes. Can anyone actually verify this?

[@Lightsngear]

billywhizzy Yes it can! That is what the "quick test" does.

[@billywhizzy]

Great!! Many thanks :D

[@DevMindset]

Came for a review, left with nothing, would love to see this guy charge a battery at 700amps!

[@Lightsngear]

Can you be a bit more specific in your criticism?

[@DevMindset]

Lightsngear you made a faux pas, charging a small cell like this charger is designed for at 700amps would certainly destroy it and cause a nice fire. Granted, you could try charging at .0015vdc but the wires would need to be as thick as your arm to handle 700amps of current. At such a low voltage though the battery wouldn't charge....anyway, as a result I determined you might not know much about electronics and ended the video. I hope you're not discouraged.

[@Lightsngear]

I've learned most of what I know regarding amps and volts by working with this equipment. Everyone has their strengths, and this is apparently one of yours! Which cell are you talking about? Maybe an 18350 or 14500? It was always my understanding that lower mA's were recommended for charging smaller cells, and that 700 was about the limit. I have used that current in the past without any noticeable deterioration. It's been my observation that many chargers will adjust the current accordingly, regardless of the setting. This is one reason why I was recently impressed with the MiBoxer chargers, which selects the current on its own, depending on the type of cell it's given. And no, I'm not discouraged :-)

[@DevMindset]

Lightsngear that's great, usually batteries (collections of cells) can safely charge at 1C. One C is equal to the amp hour capacity of the battery. For a 2AH battery, you could safely charge at 2Amps. Hope that helps.

[@ElectronicCreations]

I bought same one and i noticed that he don't read voltage correctly. He add 0,06V, and on discharge test batteries becomes hot. My other discharge tester don't heat batteries at all on much higher discharge amps. Did you noticed any similar problems?

[@Lightsngear]

No I haven't.... but it could possibly be the batteries.

[@ElectronicCreations]

+Syrbuff batteries are ok. by my understanding this charger charge batteries to 4.14 instead of 4.2 and discharge them under load to 2.8 what is 3.27 when you dont have load on batteries.

[@gabea.2123]

I got this charger yesterday, I used it to charge some duracell batteries just like the green ones in the video. At the end of the charge the display says "Full" and by cycling the display, the mA or mAh put in them (if I understand correctly) which is different for each battery; is there any way to tell the actual capacity of the batteries? 2400mAh, 2100mAh, etc? I know for example that some eneloops say 2400mAh but some people claim that they've been able to charge them to say 2700mAh, how do they know? Perhaps by doing a full discharge/recharge? Thanks!

[@Lightsngear]

Gabe A. Yes, for a capacity reading you would need to do a full discharge and refresh cycle.

[@gabea.2123]

Syrbuff Thanks!

[@born2bbald12]

Highest compliments on your review! (I have seen others). I hope this is a silly question. I live in California. Will I get a US charger in I order this through say, Amazon? The other reviewer complained of having an European power supply having shipped with his unit.

[@Lightsngear]

I'm glad the video was helpful. I would have no reason to believe that the seller would include an unusable power supply, but mistakes happen. If you're ordering FROM Amazon, I wouldn't worry. If it's from a 3rd party seller, you could try contacting them ahead of time to make sure.

[@born2bbald12]

@@Lightsngear Thank you for your words and your work! I received the unit today!

[@Lightsngear]

@@born2bbald12 Thank you! That's great. I hope it lives up to your expectations :-)

[@timucinpusat3518]

Is There any better , more functional charger than this? If yes which one and why? Or should I buy this Opus?

[@Lightsngear]

I've never spoken negatively about the Opus, and it has some great features. However since I reviewed it, I began testing several MiBoxer chargers which are really great. The problem with some of those, is that their availability seems to be less than it once was. Their are a few available, including their C8, and C4-12. They're great, but don't have the discharging function of the Opus. XTAR also makes a C8, and theirs DOES have extra features such as the ability to test and discharge. It all depends on what features you want. Here's a link to the C4-12; amzn.to/2Cmair0

[@mydogskips2]

I'm not sure here and am asking, but isn't 1.28 volts for a NiMH battery high? Doesn't that mean it's fully charged? Isn't the nominal voltage rating for NiMH batteries 1.2 volts? I'm asking because I'm wondering if there could be a chance of them overcharging? I believe there should be "trickle charging" in the charger, but I think that voltage reading for a NiMH is a bit high, and my understanding is that it's not that difficult to overcharge NiMH batteries, potentially damaging them. The thing is that it's not always easy for the charger to recognize that the battery is fully charged. edit: Apparently the cutoff voltage for NiMH batteries is 1.45 volts, NOT 1.20, interesting. I guess it's just the discharge voltage that's 1.2(for NiMH batteries)?

[@heardandtested]

Hey, Do u think the charger will discharge faster if I upgrade the power supply to 12v 5a output.

[@Lightsngear]

Chris Ngwa I'm not sure but I suppose you can try it.

[@catalinmoknu]

You don't need a more powerful power supply to discharge faster, it dissipates power by converting it into heat with some internal resistors. just read the manual, it's all there, except the secret switch for charging li-po if i'm not wrong :)

[@chrisleech1565]

They are a little plastic sounding and all but can be had for as little as $13USD delivered. I don't think that could be topped for function and battery types it will charge. However, the XTAR is now on the market and a little more sophisticated but a lot more cash outlay.

[@Lightsngear]

Hey! You just left an additional comment....but I don't "SEE" it anywhere! (it's not within the published comments)

[@chrisleech1565]

Deleted the first one. Didn't have my prices right

[@Lightsngear]

okay, gotcha.

[@ptmoy1]

How do you select battery type (e.g., nicad, nimh, or LiIo) on this charger?

[@Lightsngear]

ptmoy1 Doesn't the review describe how to do that?

[@ptmoy1]

If your review answered my question, I wouldn't have asked in the first place, so no need to be condescending. At around 8:17 in the video, you put a NiMH battery in one of the slots, and it started charging. The charger auto-detected the voltage correctly; but it can't know the difference between NiCad & NiMh based on just voltage, which prompted my question. I know a charger can use NiMh algorithm to charge NiCads. But if it knows the battery is a NiCad, it can fine tuned the algorithm a bit. At around 11:00, you said the user should know what type of battery he put in, which is irrelevant. It's more important to be convinced that the charger can identify the inserted batteries correctly, and use the best charging algorithm. BTW, for NiCad & NiMh, it's completely save to charge at 1C. For a sub-c 3300mAh NiMh battery, 1C is 3300MA. For LiIo cells, it's best to charge at 0.5C or lower, but still save to charge at 1C. I use Sanyo NC20650A cells rated for 3100MAH for some power tools. I routinely charge these at 1.5A using my RC chargers.

[@Lightsngear]

My orig reply was meant to be in a questioning way... not in a condescending one. So anyway, I have never used the charger for NiCad batteries, so I cannot comment on that aspect. The short answer; is that there IS no way to select the battery type. As the video should demonstrate, all you can select is what you want the unit to do. Once the battery is inserted, (whether it accurately detects its chemistry or not --- based on voltage alone) it analyzes the status and begins the charge. As you point out, perhaps this is not ideal...if voltage is its only determination. Given your concern, I would suggest one of the MiBoxer chargers instead.

[@mydogskips2]

@@Lightsngear ​ I'm not sure about this, this information is mostly new to me, I mean, I'm looking for a charger and am trying to learn by watching the video, but I believe the charger should be able to automatically detect the type of cell in each slot. Also, NiMH cells and Li-ion cells charge to massively different voltages, 1.45 and 4.20 respectively, so I think the charger should be able to determine the chemistry based on that information alone. And given how you said you've never charged a NiCad battery, my understanding is that they are really quite rare now and practically obsolete. But regardless, the charger should be able to automatically recognize the cell chemistry for each slot and charge it appropriately.

[@jasonmanalo992]

can you change the current for each slot simultaneously?

[@Lightsngear]

Yes you can.

[@polarweis]

So how do you know on what current you need to charge your battery? (Keeppower 26650 5200mAh protected)

[@Lightsngear]

There aren't too many parameters about current selection. I always follow the basic suggestion that smaller, lower capacity cells (16340, 14500 -- etc) are better charged at lower currents. Meanwhile larger batteries... 18650 and up, are fine at any current... and can handle larger currents without much issue. Some people warn that higher currents will cause the battery excess wear and shorten its life. I usually stay with 1A for those sizes. Besides, as the battery gets close to "full" most chargers back-off and lower the current automatically.

[@polarweis]

+Syrbuff thanks for your reply:) does 4 26650 fit in this charger in te same time?

[@Lightsngear]

polarweis I'll need to check on that and get back to you. I know you were initially asking about 26650's, and something reminded me that although they fit into the charger slots, the positive tip of the battery is too high and does not make contact with the chargers positive point. I'll check it with a flat top cell and let you know.

[@Lightsngear]

Sorry for the late response.... but...I checked some of my 26650's, and only the flat-tops will work in the Opus. The "buttons" on the others don't hit the contacts in the charger properly. Thanks.

[@polarweis]

+Syrbuff thanks for your reply:) i have bought the keeppower 26650 5200mah with a button top but the total lengt of the battery is little bit under 70mm(including button) so i hope tell fit. Do you know another charger thats better? I read some good stuff about xtar.

[@mokotramp]

how does this manage 1A in each bay when it's total output is 3A?

[@Lightsngear]

The power adapter is 3A, meanwhile the charge voltage is 4.2

[@mokotramp]

+Syrbuff That's great, thanks!

[@youcrackmeupdude]

+mokotramp The input has an upper limit of 3.0A at 12 Volts = 36 Watts Each cell will charge at 1.0A at a margin over the battery's voltage. Say 4 batteries at 4.2 Volts charging at 1 Amp, 4 x 4.2 x 1 = 16.8 Watts. Or 2 batteries at 4.2 Volts changing at 2 Amps = 2 x 4.2 x 2 = 16.8 Watts. Or 4 batteries at 3 Volts charging at 1 Amp = 4 x 3.0 x 1 = 12 Watts. So if the most we're using is 16.8 Watts, the input is around 16.8 W / 12 V = 1.4 Amps. At the lower end of the spectrum, 12 W / 12 V = 1 Amp. The barrel connector will only be passing 1 to 1.4 Amps, well within spec. I hope this helps explain the confusion.

[@mokotramp]

+youcrackmeupdude cheers buddy! Mine arrived a few days ago, pretty impressed with it so far!

[@grandpixel]

I read that the 3100 v2.2 and 3400 v2.2 are the same, is that true? Why would they make 2 models that are identical?

[@Lightsngear]

+GrandPixel You know...I've tried to figure that out too. I can't see any discernible difference. There's must be something small that differentiates them. I can only think that maybe the charging current was boosted a bit.

[@danijel124]

I ordered this charger today off your link on Gearbest. I do hope I receive this item because I have read some online reviews about gearbest not being good. Is gearbest a good and trustworthy site from your opinion? Best regards

[@Lightsngear]

Thanks, and yes they are. I've bought from them a few times, and although shipping has been a bit slow on occasion, I've had no issues getting the products as they were described. Plus, their prices are very competitive!

[@danijel124]

+Syrbuff Youre saying this because youre payed to say this. I want your personal opinion

[@Lightsngear]

danijel124 That IS my personal opinion! They're a good site to buy from...but their shipping will obviously take a little longer. How much more honest do you want me to be?

[@123benley]

+danijel124 i use gearbest im in uk its about 2 weeks delivery but for the prices i dont mind waiting,im a genuine customer not paid ect for this , i just bought a billow v3 plus for 15£ in uk these are 32.99 so less than half price too , plus i used my points i amassed from buying the ud bag 15£ too sells for 35£ in uk , we are screwed by 20vat tax on everything , i got coil mate ud but that was 32£ so no difference , but got ijoy limitless 17£ ijoy tornado 16£ + 4.5£ for 6 coil tornado deck , im wanting the new Griffin plus 5ml rta now as got a 18.9mm build deck compared to griffin 25mm top airfliw 6.2ml an 17mm build deck ,so either the new one of the griffin mini , but nobody has it yet efuntop has pre-order on it but will be 36£ in uk so its 36usd at moment which is still cheapest than uk

[@dj_sorra8605]

21700 os good for this charger?

[@Lightsngear]

@@dj_sorra8605 yes!

[@gorytarrafa]

Discharge/ refresh is the repair mode ?

[@Lightsngear]

GoryTarrafa Repair mode? I don't think so.

[@gorytarrafa]

Syrbuff I ask this because some X-tar chargers have repair , doesnt this Opus do the same ?

[@gorytarrafa]

***** tks .

[@sinusshephard5314]

Anything better than the Opus in its price range?

[@Lightsngear]

Although the Opus is a good charger, I'm also very fond of the MiBoxer brand, which are usually a little cheaper. Check them out here; amzn.to/37DspmR

[@troy3456789]

The unit doesn't measure battery temperature and turn on the fan in response to battery temperature. You don't seem to know or care that there is a magnificent difference between 700 amps and 700 Milliampere-hours (mAh). I really wanted to know more about this charger-tester and you simply showed me how little you cared to know about it.

[@Lightsngear]

What exactly is it about the difference between 700mA and 700mAh that you seem to think I don't care (or know) about?

[@nodoubt46able]

u said 700 AMPS in the video! wow!

[@mydogskips2]

@@nodoubt46able Well, he obviously made a mistake and misspoke, it happens from time to time, but the important thing is how you made a point of calling him out on it, great job. BTW, I think we all know what he meant.

[@mancuso1967]

@@Lightsngear Hey, just to be sure,.. mAh is a measurement of battery capacity and discharge capability. mA is a measurement of current flow. If you pretend a bucket is a battery and were filling a bucket, say with a hose, (charging the battery) - mA measures the flow through the hose. Now if you put a lid on the bucket, stuck a hole in it to let water drip out, turned it upside down and pretended it's a battery, mAh is a measure of how log it normally takes to discharge the battery, it is an indication of how much water the bucket carries. For example, a 3000mAh battery means it will hold enough charge to give you 3000mA of power (current) for one hour. Or, 1000 mA for 3 hours, 500 mA for 6 hours, 10mA for 300 hours, etc...

[@vacationeruk]

whats the time for 4x 2000 bats?

[@Lightsngear]

+vacationeruk To be truthful, I haven't charged anything at the max current yet. But as with any other setting, I'm sure it would vary.

[@booradley1065]

Divide the total mah by the charging rate in ma and add a percentage for the tapering off as it reaches full charge. The percentage added will be less the lower the rate of charge. and It will be different based on the internal resistance of the particular cells.

[@Lightsngear]

@me ski. If it's between one or the other, I think this Opus is better.

[@Lightsngear]

+me ski I simply prefer the Opus because of its ability to display the different bits of information. Also because it can perform a discharge & test on each battery. Also, your other comment about the VC4 NOT accepting AA (NiMH) isn't true. It lists AA's on the back of the charger, and I had just charged some AA's in it just 2 days ago.

[@donpowell5939]

You that are showing the demo video better read the instruction before showing the damn thing. You don't know what you are talking about.

[@germed]

you make a review and dont know this unit so well at aoo slot one and four or slot 1 and 3 read the manual first and get firm with the unit before you wanna tell other about it

[@Lightsngear]

My apologies. I generally know how these chargers operate, and most if not all, have similar attributes regarding the current that's available in each slot. Sometimes, the manuals for these products are written in "Chin-glish" making some of the functions difficult to understand.

[@mydogskips2]

@@Lightsngear Since you're too polite to say it yourself, I would mention that if someone is going to write a comment criticizing your content they should at least be able to spell "all" correctly. I'll refrain from saying anything about using capital letters and punctuation, but it does help immensely with readability and intelligibility. Just saying.

[@PqKiller25ToLife]

i am having a hard time figuring out how much mAh is already in each battery appart from knowing how much mAh the charger has already put in there, so if someone figured it out please tell me cuz i really want to check if i got fake batteries here thanks in advance

[@Lightsngear]

There's no way of knowing how much mAh is in a battery at any given time. The voltage is the only stat you can know. What is the brand of the batteries? --- and what is the STATED capacity?

[@PqKiller25ToLife]

ive got SONY KONION US18650VTC6 - 3120mAh - 3,7V - 30 A batteries, so the voltage might be 4.20 when fully charged but the capacity can vary like be below 3000mAh u know what i mean pal

[@Lightsngear]

Yes I do! Well, I'd have to assume they're pretty good cells. And, since they're high-drain...probably not protected either.

[@PqKiller25ToLife]

Lightsngear no not protected but i am using a temp controlled Mod, so i dont worry about that, but only the capacity cuz i got them from ebay and i heard there are a lot of fakes making their way through as well lol. but thx for the info man

[@Lightsngear]

Yup --- always gotta be careful of the source! You're welcome!

[@paulg7407]

Can we balance 18650s with this charger? Like manually choose which voltage you want to put into the battery?

[@Lightsngear]

Paul Gallant Yes you can.

[@paulg7407]

Can you explain how to do this? id like to manually charge them at 3.8v for storage, its a great charger but i havent figured out that part of it

[@Lightsngear]

Paul Gallant Ahhh...that should be as simple as watching the voltage and popping them out. There's no way to SET the voltage to 3.8

[@paulg7407]

Lightsngear ah okay thanks, i thought it was capable of doing what an imax b6 can do as far as balancing without having to look at the charger till it hits the right voltage, but the more i look online reviews for the imax b6 the more discouraged i get from buying it, thanks for the fast replies :)

[@Lightsngear]

Paul Gallant you're welcome. yes I have an Imax too but I rarely use it.

[@robviolin1]

Great vid. Thanks

[@Lightsngear]

You're welcome, thanks!

[@Lightsngear]

I have a new coupon code you can use for the C3100! Just click the link in the description above and use code OPUSD and the price will drop to $30.99

[@gixxerboy555]

hi,what's the exact difference between the mode : discharge and discharge refresh please?thx

[@gixxerboy555]

discharge , discharge refresh and discharge test...?can you please maybe tell me a little more about these options/modes? example : I got a new 18650 battery with 3400mAh...and I wanna know if my battery has the capacity of 3400mAh...less or more...can I know it with this charger?thx

[@gixxerboy555]

Sorry Syrbuff ...I just wanna ask..I want to control the exact capacity of some Li-ion battery's in various formats...can I do this with this charger or do I need another/better charger?Cheers bro.. ;)

[@Lightsngear]

gixxerboy555 Control the exact capacity? Not sure that I follow. Can you explain further, sorry.

[@gixxerboy555]

It's ok bro...I told ya in your other video...Fake Ultrafire battery's ...cheers ;)

[@strika71]

Sorry for double up comment, stupid YT android app kept telling me it was unable to post, even though it actually did :-/

[@Mr1982bigman]

happens to me loads

[@jwuethrich8385]

you need to do some homework and understand what a batteries C rating is so you dont burn your house down. say I have a NCR18650GA which is the only 18650 on the market that is truly 3500mha. (free tip there...anything claiming to be higher mha is not...china produces garbage with labels stating what ever they feel will sell) drawing 3.5amps from it is 1C discharge. safe and ideal charging with lipos is generally considered 1/2 c. which would mean 1750ma. Im not going to go into the why but sometimes its not a good idea to charge much lower than 1/2 c either. stick with in + or - 300mha of 1/2c and you should be good. The only reason you can buy these cells is the flash light and vape comunity faught long and hard to create a consumer available supply channel. MFGs considered them too dangrous when not welded into systems professionally designed. Im not saying dont use them... but do keep that in mind, they wernt made to be idiot proof and you may pay dearly if you dont respect them and do your homework. also look up legit mfgs not in china. its a short list. also try not to confuse 0.700a for 700a like you did in the video :D

[@Lightsngear]

Johnathan Wuethrich I only buy "brand" batteries unless I'm asked to try out a lesser known brand. And don't you mean mAh? Thanks for the comment.

[@jwuethrich8385]

if you are referring to 0.7a no i meant amps... 0.7a or 0.700a = 700ma, you can say 700ma or 0.7amps and they are the same. meteric prefixes. I did screw up above and edited it where i said "lipos is generally considered 1/2 c. which would mean 1750mha" the H shouldnt have been there and has been removed

[@booradley1065]

ok mr amp milliamp police it is fairly obvious that he is talking about milliamps. Since a 700 amps currently is more than is supplied to most residences and many commercial electrical panels.

[@modo203]

2:15 cheap ass Chinese production. You know it's true

[@Lightsngear]

Aside from the occasional "blip" this charger has had with selected batteries, it's been very reliable. Say what you want, but it's been a solid performer for me. I would classify "cheap ass Chinese production" as that shit they supply in those absolutely awful $15 flashlight "kits" on Amazon.

[@DragonsREpic]

I hate how he spells the abbreviations, really gets under my scales.

[@Lightsngear]

And how do YOU spell them?

[@DragonsREpic]

I say them, I don't spell them, cuz there abbreviations?

[@booradley1065]

to each his own

[@booradley1065]

I think they are acronyms.

[@danijel124]

Okay.... I got this charger. I tested it thoroughly and I noticed that it has a lot of glitches in the firmware. I noticed also that the batteries dont last as long on this charger. Compared to the xtar vc4 this charger is a piece of crap!!!! The xtar is a whole lot better. I never had issues with batteries using the xtar. As soon as i started to use this opus shit my battery quality has degraded. I dont know why but apparently this garbage charges diferently than xtar. I am talking from experience because I own both the xtar and this generic opus shit. The opus isnt nearly as good as the xtar period!!!! I will consider to return the opus to gearbest because its a waste of money and batteries

[@Lightsngear]

I'm not following what the issue is. I own both chargers too, and I see no difference in the manor in which they treat the batteries. I don't know what you mean by "the batteries dont last as long on this charger."

[@booradley1065]

if you try to charge using the maximum rate of the charger, the battery chemistry will break down quicker due to over heating and shorten the life of the battery.