Eachine EV800D External Battery Mod

[@Bigbeardfpv]

funny enough, I broke the external plug in port today, and this was a great way to never have that issue again thank goodness. Thanks for the tutorial !

[@TekkGnostic]

Exact same thing happened to me today taking it out of storage.

[@robmckennie4203]

I have some slick panel mount xt60 connectors, and seeing how easily it comes apart I'm tempted to do something similar on my headset. Thanks for showing the mod

[@DoRC]

Go for it. Its a great mod!

[@eXpire163]

Hi, just a tip, unplug the battery before removing the display and the board, otherwise they might touch and short out as the display has a metal back.

[@DoRC]

Always a good tip! Been messing with electronics a long time but I still miss the basics occasionally. Thanks!

[@Schradermusic]

The battery plug doesn't have any pins sticking out.

[@eXpire163]

@@Schradermusic Display has a Metall back and could touch the bord and shorten out

[@Schradermusic]

@@eXpire163 Oh now I get it sorry

[@LowVoltage_FPV]

One mod that I did was glue washers around the channel scan and power button. The hole in the washer fits around the button so you can still press the button. The power button is quite exposed and a few times I have found that the googles were discharged because something in my flying bag had rested on and turned on the power. I can't tell you how many times I have accidently pressed the scan button when putting the googles on or off. It's a pain having to rescan the channels looking for your model, or manually setting the channel. Now it's not as likely that i will do it by mistake.

[@DoRC]

Sounds like a great mod!

[@verox43]

What a great video! Everything is right on point with no time wasted :)

[@BigCodyFPV]

Thank You for making this video, I used your tutorial BUT I did some things completely differently so I can still just pull out the 18650 batteries and throw them in a normal 18650 charger. Trying to make a good how to out of it too, Thank you again for the info and inspiration buddy!!!

[@DoRC]

That's awesome to hear. I'm going to be making surface RC videos for a while so if you're interested in those be sure to subscribe :-)

[@BigCodyFPV]

@@DoRC I love rc cars and stuff too! I just did a video with the new ARRMA Fireteam in collab with RC Nuts! I would love it you cam to check it out! it premiers @ 4:15pm pst (49 minutes from now)

[@DoRC]

@@BigCodyFPV awesome. Ill check it out:)

[@BigCodyFPV]

@@DoRC you good sir rock!!!

[@vhcxhbvg]

Why don't you use li on batteries? They're safer right? Is the one built in lipo?

[@roman8747]

It's a lot easier to change the head strap. Rotor riot sells one that works. It's a thicker stronger flexing. It fixed the problem for me, and the strap has a compartment for an external battery. With the supplied cable I use a 3s lipo. It works all day and you don't have to do some kind of weird mod.

[@TaddaFPV]

I’m interested in making this mod, do you remember which specific model the strap was?

[@DoRC]

@rockinpanda hopefully he sees this with several years ago.

[@DFEUERMAN]

I recommend adding kapton tape to entire back of the screen. The back of the screen looks like thin-steel or aluminum, and it's conductive. One youtuber demonstrated in his battery mod video that this metal back is charged at something like 5v, so it causes bad interference if the screen touches the circuit board. (It was happening to me.) Yeah, so about 2 or 3 single layer pieces of kapton tape did the trick! (depending on the width of the tape. I think I have a roll of 2" wide kapton.) I hope this helps someone!

[@DoRC]

Great tip! I never had that issue with mine but I can definitely see that being a problem.

[@Azim196]

I haven't used my EV800D yet, but I was planning on using it today when I discovered that something was wrong. I believe the battery was DOA. Multimeter shows no voltage, so I am forced to do this mod. Not too bad since I have a 2200mAh 2S laying around, but I wanted to use it today! Thanks for the video, always nice to preview a task.

[@DoRC]

It's a bummer the battery is dead but this mod is awesome so it may be a blessing in disguise! Thanks for watching and a sub is appreciated!

[@Azim196]

@@DoRC I was thinking the same thing, a blessing in disguise.

[@jlo51500]

My battery was DOA as well. Blessing in disguise for sure. I'm glad there are so many people willing to share. Great mod.

[@MALNTV]

I realize this is an old video, but will be doing the very same mod myself. My battery not only takes forever to charge..but is probably bad. To make matters even worse..the metal charging plug snapped and no longer provides a charge! Instead of buying a new set of goggles only for the market to shift to full HD, thanks to DJI, next year...I will be doing the same mod. Really enjoyed your video!

[@DoRC]

Awesome! I've been loving my external battery and better weight distribution. If you can do the elastic batt holder onnthe headband all the better! Thanks for commenting! A sub is appreciated and dont forget to enter the giveaway in my runcam nano 2 video!

[@JordanHourGlassDJ]

Since I'm a n00b with FPV still, I have a question in regards to mounting the battery externally (since I fly with the same goggles...) Could I substitute that built in battery for a 4s or even a 6s battery? (I don't have any 2s batteries at all but have a bunch of 4s/6s's laying around. I look forward to your response! 😎😁🤘🏻

[@fcass]

Hey, did you notice the solder pads next to the battery connector labeled 2s? I can't find any information on that. My battery finally died and I want to replace it well. Love these goggles still after years.

[@jonathancharlesferriols1208]

Instead of connecting it to a lipo battery can I instead connect it to a usb cable and use a power bank as my battery?

[@DoRC]

I'm not sure. I don't think the goggle will work on the 5 volt output of a USB but you could try.

[@solen1849]

They work with the MIcro USB version

[@tastenheber]

Good idea. I think I will do the same thing. But since I‘m German, I need to make this more complicated than it needs to be, by using some kind of connector. Maybe a barrel plug or a audio jack type connector. There are also cheap Chinese headlights with 18650 battery cases for the back of the head, maybe these can be reused for this, too.

[@DoRC]

Both good ideas! A sub is appreciated:)

[@fcass]

I would recommend using the type of connector your 2s batteries have. So most likely just order a pack of xt30 connectors (I always think, I'll never use that many and 6 months later I'm buying more!). That way you can have a bag full of batteries for a day at the field.

[@tomme6x3]

I can see pulling the battery to reduce weight- can you just use the charging port on the opposite side and the battery adapter the goggles came with to power them instead of doing this full mod? TIA

[@DoRC]

I'm not sure but it is worth a try. Thanks for watching and a sub is appreciated :-)

[@bionno78]

so the male connector that goes into the main board of the googles is a classic JST , 2 pin, like the 1S battery uses ?

[@fcass]

Oh I watched farther and realized the battery I thought that came with it was 1s. But it's 2s. I'm just going to put an XT30 on it. Thanks for the video.

[@DoRC]

No problem! If you can I definitely suggest mounting the batt externally. The goggles balance much better without the batt in there.

[@fcass]

@@DoRC Yes indeed. Since it already had a PH 2.0 female connector on the board, I just made a cable with a male ph2.0 on one end and an XT 30 on the other. I grabbed a 1500mah from an RC truck (and a Deans T-connector to xt30 adapter I made before ha ha) and I can just drop that in my back pocket. However >>----> having a cable hanging off of it was instantly annoying! (you've got a radio around your neck on a lanyard, and a drone in your hands you're trying to strap a battery onto already. The cable wanted to spin around the lanyard and the sticks as I leaned over ha ha.) So I will probably use some 650mahs I have that will be a great size for on the headband. Once again thanks for the video. I found it on a search and reached for the subscribe button and I already was a subscriber. :) )

[@hockeyguy820]

Keep in mind that the EV800D stock 2S battery has a protection & balancing board under the shrink wrap. The two leads don't go straight to the LiPo cells.

[@RADERFPV]

Best box goggle on the market. Nice mod bro👍

[@DoRC]

I agree! I've tried fatsharks and honestly I still prefer my ev800d. The external battery really takes it to the next level as it makes it way more convenient and comfortable!

[@DuFPV]

When you use an external battery like that do you need to be careful not to get the voltage too low or you can use it until the goggles stop?

[@DoRC]

As long as you're using the same voltage as the stock battery the goggles internal low voltage protections will still work.

[@madladdan]

Does the charge indicator still work?

[@Barneyveld93]

what minimal c rating does the battary need to have. i have a 3000mah 5c 2s lipo. would that work?

[@DoRC]

Pretty much anything is going to work. These goggles don't draw very much current

[@jakeboynz]

Great little mod thankyou. Just wondering with your 2s 450mah battery that you used - Can it be any C rating ? I don't want to use a 20-30C and blow the unit as I know these goggles discharge fairly slowly. Cheers

[@DoRC]

You can use any c rating. The battery will only discharge at the current needed regardless of how high the c rating is. Thanks for watching and a sub is appreciated!

[@mariusztv4339]

My ev800d comes with 1s lipo is it ok to run 2s with it or the voltage would be too high?

[@DoRC]

I'm not sure. Mine was to s compatible but that was a while ago and its entirely possible that the internals have changed since then.

[@mariusztv4339]

@@DoRC thx :) I will keep using 1s

[@yellowej2]

What gauge wire did you use to extend the wires to the back?

[@DoRC]

22ga I think. It doesn't need to be very thick as the power draw is very low. Nice flexible silicone wire is best though so it moves with the band. A sub is appreciated!

[@ab7rs]

why didn't you just remove the battery and then use the charging jack and the included 2s/3s external battery cable?

[@DoRC]

I wanted a permanent cable and I'm not sure if the charging Jack will power the goggles without a battery installed. Also the charging jack stops the on screen charge indicator from working. Thanks for watching a sub is appreciated!

[@AdeebMissaghi]

Also since I literally just tried that yesterday. If you plug in the 2s/3s charge in port without a battery plugged into the board. You get magic smoke. Luckily I pulled it out fast enough and the goggles seem to work still but definitely not a long term solution. Better to leave the battery in, and use a 3s external pack to that small barrel jack to charge the main battery while in use. Essentially the same result as he got here but without having to open anything up.

[@DoRC]

Good to know!

[@bubblict]

Hello what wire were you using? 22 AWG?

[@DoRC]

Pretty sure. Just about anything within reason will work though. The current is very low.

[@garsei4347]

Thank you for this video, it helped me a lot, but I haven’t found the wire pack, could you share a link for buying them?

[@DoRC]

High unfortunately it won't let me put links in comments but you should be able to find it on Amazon.

[@upyopyo]

My video signal seems to be very weak. When my drone flies away more than 10m, FPV shows already black&white noise and almost invisible. I am a beginner, and FPV is almost new product, spending 2 months. I contacted Eachine's customer service, but of course no answer! If anyone know how to fix, I really appreciate it !!

[@haydenm.3912]

Great video! Do you know how many volts it can take? I'm thinking about doing this with a lipo and dont know what it can take

[@DoRC]

As far as I know it's 2s only.

[@haydenm.3912]

@@DoRC Cool! Thanks for the quick response!

[@DoRC]

Np. A sub is appreciated:)

[@martini4753]

Hi, can I use 3s lipo for this?

[@DoRC]

I'm not sure. I never tried and the increased voltage certainly could be problematic. You could get a little buck or standalone BEC on Amazon and do it that way.

[@the_real_foamidable]

Hi, did you try to run the goggles from the charging port with a 3s if the battery is disconnected?

[@DoRC]

Nope. Let me do that and get back to you!

[@DoRC]

Works just fine from the charge adapter with a 3s with no battery connected. Just keep in mind the battery level meter wont be accurate in this configuration.

[@the_real_foamidable]

@@DoRC Thanks for testing. I just ordered one for me. I will probably mod them as well. Looks easy enough. Greetings from Weimar, Germany

[@DoRC]

No problem. A sub is greatly appreciated!

[@fcass]

Hey the big reason not to do this (I found out the hard way the one time I tried it lol) is it will just destroy your 3s battery. It doesn't shut down at 3.3v per cell when you are using it that way, so it will just drain the cells until your battery is barefoot, fat and pregnant and doesn't want to do anything anymore. ;)

[@lucanierz1003]

When I do this mod, will the goggles charge whatever battery I plug into it via the old port?

[@maxmustermann2197]

I did this mod, changed the connector to a XT30 and used a 2000mah 2S 8c Lipo with it. It worked in the beginning, but then I plugged in the battery and it turned on and immediatly off, now when I press the On Switch I just see the green light but the goggles wont turn on anymore. The battery is fully charged. When I try a second time, the light is red, no flashing. After some time when I try again the light will be green again. Any idea what this could be? Is there anything one can do to to fix this?

[@DoRC]

Hmm the only thing it sounds like the goggles think the battery is dead. Can you try with another to be sure?

[@maxmustermann2197]

@@DoRC I tried it with another 2S battery, its the same. But I think I know the problem, I actually have the Tobyrich goggles, not the EV800D from Eachine. I though they were exactly the same but rebranded, but actually the Tobyrich ones have only a 1S lipo inside and the chipset I read is different and won't accept 2S... So I guess I burned the board. Just strange it could handle it for a while in the beginning. So I guess it toast then, or do you know if I could replace something on the board to get it working again, some chip?

[@DoRC]

Very strange. The tobyrich does look identical but I suppose the internals could be different. If the board can only handle 1s it's likely only a couple components were damaged but o have no idea which ones:(

[@maxmustermann2197]

@@DoRC Would be too much hassle to exchange some small chips anyway, the goggles were very cheap. I guess I just buy a new one. Thanks! :)

[@DoRC]

@@maxmustermann2197 very true.

[@doodlesdeluxe]

Thanks for the mod. I know this might be an odd question, but can you charge the new battery through the goggle charger?

[@DoRC]

Yes I suppose you could. The goggles won't really know the difference. Thanks for watching and a sub is appreciated!

[@fcass]

Bu the way Nik, would definitely not recommend this. Just get on amazon and buy some xt30 connectors. That way you can just plug in your batteries (notice plural) at the field, and charge them normally with your charger. The main reason though is the cells will most definitely become unbalanced and your battery will become junk after you charge it that way a few times. You really don't want to do this unless you enjoy short flights ending in blind crashes hehheh! (The battery will provide less and less power....)

[@kelapse8587]

Hi my friend! nice video. I was thinking to do the same Mod, solder a xt30 and use a li-ion batery 2s 5000mah. what do you think?

[@notkira_x]

Great Mod im gonna do like a balance plug connection where the google splits up so i can still use it as an monitor with a different battery

[@DoRC]

Cool idea. Maybe just add another xt30 at that point?

[@notkira_x]

@@DoRC yea unfortunately i dont have one lying around

[@muhammadisnainizuhriilyas1406]

Great video bro. Is it possible to use stock battery and charge with the default charger ?

[@DoRC]

Absolutely. Just wire it up with the extension as it was originally and charge like normal. It's a bit long for the way I mounted it but I'm sure it can be done. A sub is appreciated!

[@kouvasilias123]

can you use a 3s battery?

[@DoRC]

I don't know. I wouldn't risk it though.

[@ryanclawson7307]

I swapped the internal battery with a tiny 2s 450 so that it's lighter, but I can also use it as a monitor if need be. Then just have the external battery plugged into the charging cable the headset came with

[@DoRC]

That's a good way to go as well. I wanted to get the lipo out of the goggles in order to make it as light as possible. It also allows me to easily charge the lipo with my regular charger. Thanks for watching and a sub is appreciated!

[@ryanclawson7307]

@@DoRC Thanks for the good video, I'll sub

[@radekr981]

I'm charging 600mAh to 3000mAh 2s li-ion battery every 6 flights (4min with DVR). I have it almost exactly the same like in video, except I have xt30 connector closer to the screen/hole.

[@DoRC]

Hmm. I have a 1500mah 2s right now and definitely get more than 6 flights out of it. I wonder what the difference is. A sub is appreciated!

[@radekr981]

@@DoRC 100mAh per flight gives more than 6 flights from 1500mAh

[@fcass]

Really people, these goggles are great (read story below) with a powerful receiver, and I've used all the FatSharks etc. Do this mod right and you'll love them even more. So I would just like to add these notes to Do RC's excellent video (mostly covered below already): [ ] Hit like and subscribe and hit the bell to support our friend here! [ ] Use connectors. If you already have 2s batteries, put the same type on the other end so you can swap packs and properly balance charge them. The connector in the goggles for the battery is PH2.0. [ ] Don't use the built in charger anymore after doing this mod. It will slowly kill your batteries. [ ] If you use the 3s cable, keep in mind it will happily destroy your battery when you leave the goggles on (it only senses low voltage on the internal battery, not the one connected to the charging port.) [ ] Consider making another longer extension cable to plug into the female xt30 you put by the headband. Make it long enough to pocket the battery. [ ] Always hit record! It may help you find your drone that went down when you watch the video. [ ] Hit like and subscribe and hit the bell to support our friend here! Drew (Le Drib from Rotor Riot) even flew my pair of EV800d's while I was trying his DJI goggles. He actually said, "Wow! I forgot how good these are." I said yeah I hate to say it but I try the fatsharks and I don't enjoy flying with them." Le Drib said, "Yeah box goggles are better! Fat shark just set out to make cooler looking goggles for your face." Of course the DJI goggles were amazing, but for the money these are fantastic, and now they have a newer model - also great.

[@DoRC]

I agree. I've tried fatsharks a few times and I prefer the immersion of box goggles. I probably won't buy anything new until the second gen of digital comes out with smaller quad hardware that will fit lighter quads.

[@sleepyheadfpv1507]

These are amazing. So I’m trying to do the battery mod, but I’m having trouble on what connector to put on? Eventually I want to run like a 3500 2s battery RDQ makes for radios. So should I just extend the cable and add a xt30 instead of a JST, or should I put the JST and find a battery with big mah?

[@DoRC]

@@sleepyheadfpv1507 it really doesn't matter what connector you use. The current draw from the Goggles is low enough that pretty much anything will work. Just use whatever is convenient. I chose xt30 because that's what I had. I recently went with bigger battery and switched to the new betafpv bt2.0 because it's smaller and more convenient. As far as battery size goes I say get the largest you can that's still small enough to conveniently attach. The sling I have on the back of the headstrap works well and actually balances out the goggles. Thanks for watching and a sub is appreciated!!

[@fcass]

@@sleepyheadfpv1507 well I just discovered these goggles work on 3s by accident lol. And I am not responsible if you try and fry. But my betafpv HX115hd's 3s batteries from RDQ are almost identical in size to the betafpv 2s 600 I was using on the goggles. Whoooops. So perhaps using a unique connector is a thought but um, you could also just be careful, unlike me, and stick with xt30.

[@Fungineers]

nice.

[@genevakeith3876]

I hate when my mess doesn't disappear when I snap my fingers.... Do a mod for that!

[@DoRC]

I'll work on it:)

[@TheMono25]

I just tried to do this with the ev800DM and I don't have any goggles it set on fire I did everything right I think it was the battery I used time to save up for sum fat sharks

[@DoRC]

Oof. Sorry that happened to you. Not sure why it would have

[@austinpnov]

I used a 2s 5200 mah 50c

[@kelapse8587]

are you using an XT30? thanks

[@skyraft7181]

Heres similar mod for 16850 batteries (that way you get much more juice) + rapidfire casing: kzbin.info/www/bejne/nnqnYp-Df6ichrs

[@DoRC]

Very cool!

[@FredoCorleone]

Your girlfriend did things better than you did. Man those cable junction outside are just terrible, you have so much space in the inside

[@DoRC]

Yeah she does have a better eye for asthetics. I tend to go for function and forget form. So far the mod is working great!

[@boskychannel]

It's work with xt60?

[@DoRC]

Sure if you solder one on

[@boskychannel]

@@DoRC i'm looking for a 2s lipo 7.4v.... but i don't know if its Better 2200mah or 5200mah... The price Is similar... What you think? Thanks

[@DoRC]

@@boskychannel if you're going to be attaching it to the goggles I would strongly suggest getting the 2200 mAh. The 5200 is going to be pretty big.

[@boskychannel]

@@DoRC thak's a lot!

[@DoRC]

@@boskychannel you're welcome. I do mostly surface videos now but a sub to my channel is appreciated if you would be interested in those :-)

[@bennedictbyy]

What wire gauge size did you used for the long wires?