Nosram battery charging & discharging

[@georgekoerich2098]

Hey Alexander! Great video! Very informative and right to the point. Thank you very much for the tips!

[@crc_fab2372]

The discharging tip is pretty useful to see battery use. I run 1/8 GTE and our mains are 10 minutes, need to play around with gearing a ESC settings to get enough run time and still be quick.

[@ryanfox2488]

Thank you for this! Really helpful!

[@vmddew]

Great video. Thank you.

[@The_Absurdistt]

Great tips Alex. During stock racing charge or discharge cycle what is the maximum temperature the battery should be allowed to reach for peak performance (assuming no battery temperature rules)? Cheers.

[@hagberg]

I usually aim for 40-45 deg C external temp when charging has finished.

[@JONESSFCY]

Thanks Alex! Pro’s Pro!

[@bluegroovemodelsports9650]

Great video

[@logutgutable]

Great Video! Alexander, does the 3.3v per cell discharge rating apply to HV battery as well? ... So as for storage, so the 3.8 ish V also applied to HV batteries? Thanks!

[@hagberg]

Yes

[@dhurth1959]

Hi Alexander. Thank you for the detailed video. Does all this apply (and is it recommended) for GT8 series? I use 10'000mAh IP LIHV batteries? So i would charge at 40A until 4,35V and discharge at 40A till 3,3V. Ideal storage 3,9V? a bit delayed comment, but hope you read/answer it. Thank you. Great work on your channel. (really considering 1/10 scale for the winter season)

[@hagberg]

Hello, I don't have any experience with the GT8 class. However- based on the amount of amp draw and stress on the batteries in this class, I would charge them at a more moderate rate. I also would not discharge them to try and heat them up.

[@dhurth1959]

@@hagberg thank you

[@jsb351]

Hi Alex! Thnk you for another very interesting video! 😁👍So on a race day , stock for example, do you cycle the battery before each time you go to the track? Thanks!

[@hagberg]

I only cycle them if they haven't been used for a month or so. Otherwise, the first cycle will be for the first run of the day.

[@jsb351]

​​​@@hagbergthanks! But what i wanted to know was if you charge / discharge the battery before each one of the qualify and finals. I mean If its worth performance wise, Thanks!

[@hagberg]

@@jsb351 100% yes, if you have time I recommend discharging before charging before every run in a race event.

[@valex6172]

Thx for these infos👍 How about new batterys, how to handle it before racing?

[@hagberg]

Cycle 1-2 times before using in a race for the first time.

[@valex6172]

with 1c ?

[@hagberg]

@@valex6172 discharge and charge at 40A from new.

[@valex6172]

ok, thank you for the infos👍

[@pesh909]

Hey mate, thanks for the vid. I’m new to Rc. I was racing 20 years ago running nimh. So, with lipo tech the rule for charging amps at capacity of battery doesn’t apply? (Ie: 6000mah battery to be charged at max 6amps). I’m about to charge my nosram hv lipo 4600 mod / 6200 graphene 4.1. I should charge these at 10amps from my charger? Thanks

[@hagberg]

Hello! For the best longevity, charge at 9-10A. For the most performance but shorter life, charge (and discharge) at a higher rate!

[@CR3DT]

​@@hagberg great video. I had the same question. So charging at 1C is no longer the case? Just turn it up to 10A which for a 4200 mah battery would be over 2C (I don't want to see my tip area on fire 😊)

[@hagberg]

@@CR3DT 1C will give the best longevity. Higher C will give better performance.

[@juanjurado2893]

Hey Alexander! Thanks for sharing! Is there any way to measure the internal resistance?

[@hagberg]

Yes, with your charger. All iChargers (for example) have this function.

[@201Tom]

most SkyRC chargers to, push the + or - button and you can see more information while charging

[@bobbymalta73]

Hi Alex So what is The ideal Storage Volts Per Cell Please? Cheers Thks For Sharing..

[@hagberg]

3.9V

[@axelhacse2331]

Hi alexander! I have been looking for the nosram 5900 shorty for many months but it is impossible to find them. Can you tell me a little more to find out if they will be available again soon. I thank you in advance. best regards, Axel

[@hagberg]

NOSRAM is working on a replacement item (new specification of battery) to be released shortly!

[@nextedge2011]

This video was brought to you by the number 40! 😂

[@ivanarriola7412]

before charging, i have to discharge first to 3.3v per cell? then charge it?

[@hagberg]

Yes

[@dsracing5703]

Hello @Alexander! As much as I know and what I have learned at university and school at physics, that resistance rises with temperature, so how can it be that, temperature in batteries reduces the internal resistance?

[@hagberg]

I'm not a chemist so I can't explain that I'm afraid.

[@RCracingSLO]

It is quite simple if you think of chemistry. Higher temperature mostly quickens the reactions :)

[@dsracing5703]

@@RCracingSLO true, but higher temperature increases internal resistance

[@RCracingSLO]

@@dsracing5703 No, you are wrong. Have a good look how Tesla cars preheat the battery pack before charging or ludicrous mode for example 😅

[@dsracing5703]

@@RCracingSLO Preheating is needed to increase capacity in cold time. It same for motor, when it gets hot, it fades. There is optimal temperature.

[@MrBoomtheroom]

What happened to the sandapow batteries you used to use?

[@hagberg]

I've switched sponsors since.

[@MrBoomtheroom]

@@hagberg any reason? are the sandapow batteries good?

[@hagberg]

@@MrBoomtheroom the Nosram packs are better performing.

[@MrBoomtheroom]

@@hagberg snadapow any good though?

[@hagberg]

@@MrBoomtheroom No

[@Loose_Lucy]

So I run VTA class 25.5 turn blinky mode .. I just bought an Icharger and I’m running Trinity white carbon 5900 mah 2s packs. I can charge them at 40 amps ? For real ?

[@hagberg]

Yes sir! You can certainly charge them at 40A, like I mentioned in the video, as this will improve performance, but it will also shorten the life of the battery pack!

[@Loose_Lucy]

@@hagberg thanks for getting back to me I really appreciate it ! how much are we talking about? cutting the lifespan in half ? Would a different brand battery last longer charging at 40a ?

[@hagberg]

@@Loose_Lucy Nosram packs hold up exceptionally well even after being pounded at 40A for many weekends of racing. No puffing/ballooning. I can't speak for other brands, but I would say that the life is shortened by at least 25%.

[@Loose_Lucy]

@@hagberg that’s not so bad. Thank you

[@HL-OOI]

I just got the HV LCG MODIFIED shorty.. 😂 can I charge at 2C? it’s 4600mah for the 2wd buggy..

[@hagberg]

You can charge at 2C without any problems, are you racing stock or modified?

[@HL-OOI]

Modified, 6.5T. I’m old school never charge more than 1C before as 20 years ago people said it might damage the lipo.. 😂 thanks for the reply..👍🏻

[@hagberg]

@@HL-OOI 2C is absolutely fine, even though, charging more than 1C isn't necessary for modified since you'll have enough punch with 1C. 2C charge vs. 1C won't significantly affect the lifetime of the pack.

[@HL-OOI]

@@hagberg good to know modern batteries can handle this.. I just want a faster charge at higher Amp say 9Amps instead of 4.6Amps.. 😀..

[@Ultegra10SPD]

With everything in the United States going stock heavy and club seemingly lax over 1C charge, Lipo safe/sack, and heat rules…the hobby is just asking for some kind of catastrophe happening at a club track, warehouse, outdoor park, or someone’s house charging say at 70a that i was informed then saw ystrdy at local track. just nuts and people don’t seem to care because it sells more batteries, chargers, motors, etc. than with mod. I left knowing i wasnt coming back to racing nor showing my boys this side of hobby anymore. -U10 PS- this guy should know that 1 of the Scandinavian countries temp banned elec rc racing after nimh explosions at a big meet hurt people and causes property damage iirc. This isnt good folks.

[@delfin2003]

I don't get it. Lipos should NEVER get discharged to 3.3volts a cell. Lipo is considered empty at 3.7v/cell. Period. That's a sure way to kill your batteries! I've discharged my brand new Pulse 5500mAh batteries in my jet to 3.3volts a cell because I wasn't paying attention. Two weeks later I went to fly again and after I landed the battery was at around 3.7v/cell but it was all puffed! Why are you not talking about C ratings and capacity? Some noob is going to watch this and will try to discharge a low C rating lipo 40amps and it'll catch fire.

[@slappomatthew]

sure seems like a lot of abuse to the battery just to warm it. why not use some kind of external heater to warm the batteries other than trying to make a fireworks show out of them.

[@kevinwest1607]

Wow it seems like you figured it all out. I wonder why? This method was tested,and guess what. It was three tenths faster per lap. It would not matter to a Joe like you,but when you consistently make the A and are battling for podiums every week it matters.