RCCrawler Forums

neuro242 · 09-21-2009, 08:29 PM

It just hit me that im charging various nimh batteries based just on their mah; 1500, 2300, 3600. Thats all i change when i charge them; 1.5a, 2.3a, 3.6a. Do i need to consider the voltage; 7.2v, 8.4v, and even AA's 1.2v? Just wondering if the charger knows the voltage and if it matters?

CreepyCrawl · 09-21-2009, 08:46 PM

Most chargers recognize the voltage automaticaly with NiMH but with some you need to input the cell count.

The only NiMH cells that I run now are the Orion 2700 AA's in my DX3R, which I charge at a .5 amp rate.

If you charge Tx cells at 1c they get real toasty in the radio, and it can cause damage to the internals.

Otherwise, 1c is always a great way to charge batteries, but if you want a bit more punch out of them, you can bump it up a bit...on your 3600's for example, try a 4 amp charge rate.

I was told way back when that it never hurts to charge batteries at a nice low rate once in a while to bring them back to life a bit. I used to do that on my Elite 1500's...around every 10th cycle I'd charge them at .1 or .5 and just let them rip for as long as it took.

09-21-2009, 08:29 PM	#1
neuro242 Pebble Pounder Join Date: Jan 2007 Location: Clarksville Posts: 113	do you have to consider voltage, or just mah when charging nimh's? It just hit me that im charging various nimh batteries based just on their mah; 1500, 2300, 3600. Thats all i change when i charge them; 1.5a, 2.3a, 3.6a. Do i need to consider the voltage; 7.2v, 8.4v, and even AA's 1.2v? Just wondering if the charger knows the voltage and if it matters?

09-21-2009, 08:46 PM	#2
CreepyCrawl I wanna be Dave Join Date: Oct 2006 Location: Centered Posts: 2,082	Most chargers recognize the voltage automaticaly with NiMH but with some you need to input the cell count. The only NiMH cells that I run now are the Orion 2700 AA's in my DX3R, which I charge at a .5 amp rate. If you charge Tx cells at 1c they get real toasty in the radio, and it can cause damage to the internals. Otherwise, 1c is always a great way to charge batteries, but if you want a bit more punch out of them, you can bump it up a bit...on your 3600's for example, try a 4 amp charge rate. I was told way back when that it never hurts to charge batteries at a nice low rate once in a while to bring them back to life a bit. I used to do that on my Elite 1500's...around every 10th cycle I'd charge them at .1 or .5 and just let them rip for as long as it took.

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Thread: do you have to consider voltage, or just mah when charging nimh's?