AC010
Hello everyone! First time posting, and I have a question about charging NiMH batteries. I've read through this forum a little and also went to other websites, but they don't seem to agree on the information.

I have a Racer's Edge 8.4V 5000maH nimh Battery. I also have a Tenergy B450AC Balance Charger. I just bought it, it's new and never used. So how would I charge it, at what A, and any tips/info? I also want to know when it's fully charged and how to care for the battery.

Thanks,
AC010
Quote 0 0
AC010
Here's the link to the battery:
goo.gl/9L3Q3K
Quote 0 0
bogusbandit56
Quote:
Hello everyone! First time posting, and I have a question about charging NiMH batteries. I've read through this forum a little and also went to other websites, but they don't seem to agree on the information.

I have a Racer's Edge 8.4V 5000maH nimh Battery. I also have a Tenergy B450AC Balance Charger. I just bought it, it's new and never used. So how would I charge it, at what A, and any tips/info? I also want to know when it's fully charged and how to care for the battery.

Thanks,
AC010

Would this help.?
Most people are using LiPo`s these days.
Wot, no Depron?
Quote 0 0
AC010
I watched that vid already.
However, on the manual I have, it says to charge it at 4.5A... I feel like that is still way too much.
Quote 1 0
Wildthing
Quote:
I watched that vid already.
However, on the manual I have, it says to charge it at 4.5A... I feel like that is still way too much.

If you charge it at lower amps that is fine and if anything it's easier on the battery, downside is it will take longer to charge that's it.
Quote 0 0
AC010
Any specific amp?

Thanks
Quote 1 0
Wildthing
Quote:
Any specific amp?

Thanks

Go to a setting you are comfortable with and time it, you know 4.5A is still safe. I would time it at 4.5 and say 2.0A , now depending on how much time you have go from there. I manly play with lipo's now and in no means a battery expert .
Quote 0 0
bogusbandit56
Quote:
I watched that vid already.
However, on the manual I have, it says to charge it at 4.5A... I feel like that is still way too much.

I think you are right, 4.5 amps sounds a lot.
Wot, no Depron?
Quote 1 0
DualDesertEagle
It's been a while since I've used NiMH batteries but 4.5 amps is suicide! Last time I checked they weren't capable of taking such high charging currents, in fact I charged a 3300 mAh one at 2 amps coz I was in a hurry to get it charged just to be able to take 1 more battery with me. The result was that it got blazing hot, so hot that even the shrink wrap around it tore in some places!

They may last a while before they run dry but they're definitely not made for quick charging! I highly recommend switching to LiPos instead, especially since u already seem to have a charger that can charge them properly. Just be careful with them, then they're just fine. In fact, I've been man-handling some of mine pretty harshly and they've never failed on me.
Quote 2 0
AC010
Quote:
It's been a while since I've used NiMH batteries but 4.5 amps is suicide!

That's what I thought...

This is actually for a competition (I'm not willing to go into it really) but the rules ban Lipos.... probably because they're "dangerous" or something.

I've tried 3A but the batteries started running out really fast after about a month or two. I need the full punch and for it to be as consistent as possible over many times of recharging.
Quote 1 0
Wildthing
Quote:
That's what I thought...

This is actually for a competition (I'm not willing to go into it really) but the rules ban Lipos.... probably because they're "dangerous" or something.

I've tried 3A but the batteries started running out really fast after about a month or two. I need the full punch and for it to be as consistent as possible over many times of recharging.

I think some charges you can cycle the batteries to get back most of their life.
Quote 2 0
AC010
What do you mean by cycle?
Quote 1 0
blkbaron
I'm sure there was a rule of thumb that u can charge NiMH @ 1/4C and 1/2C. I wasn't in a hurry so I would charge them at 400ma over upto 5 hours.
I keep going thru the same issue with my 2000MaH 4.8V 4 pack NiMH eneloop cells. I can never remember what the settings are
Not sure if that rule translates to a 5000maH pack.
If at first you don't succeed, destroy all evidence that you tried.
Quote 1 0
AC010
I'll try 1A for now.
Quote 1 0
Wildthing
Quote:
What do you mean by cycle?

The charger would actually discharge, charge , discharge and charge your battery. It would slowly try to get back some of the capacity of the battery by taking it to it's minimum and max voltage.
Quote 1 0