View Full Version : Care of NiMH's

08-10-2005, 01:33 AM
HI folks,
I'm new to Eflight and have 2 questions. I have a pair of NiMH's for my foam flying wing. The motor has an arming switch whitch must be pressed before the throtle operates. The BEC (i think) has an auto cutoff to the motor. to save enough juice to land the plane.
The question is when getting ready to recharge should i hold the arming switch in until the battery is completely drained?
Next how should these batteries be stored if they will not be used for several weeks or longer -full, partially full, completely empty?


08-10-2005, 02:31 AM
There is no need to fully discharge before recharging. Store the packs charged. NiMH packs self discharge quite quickly at a rate very dependent on storage temperature. Try and make a practice of charging them at about 0.2C about once a month if you are not using them.

08-10-2005, 03:31 AM
Thanks for the help although im not sure what 0.2c is. I only have the generic charger that came with the plane.

Jason T
08-10-2005, 03:39 AM
You can store them charged but if you wait a week or two between flying then you will want to charge them before you fly to get the full capacity of the pack.

08-10-2005, 09:41 PM

Please throw away the charger that came with your radio or plane and buy yourself a real charger that is adjustable. They can be had for as little as $30. 0.2C is 0.2 x the "capacity" of your pack in mah. A 1000 mah pack charged at C would be charged at 1 amp (1000 milli amps). A 0.2C charge is 0.2 x 1000 = 200 ma or 0.2 amps.

08-14-2005, 05:57 PM
Here's a good adjustable charger to use. My Buddy and I have used ours f/ over two years and they still work great.

Refer to:

08-14-2005, 09:09 PM
I picked up a WattAge PF-12 a year ago and I love it.

Best part is it works off 110v AC or 12v DC so you can use it as a home and field charger.
I've seen them priced anywhere from $39 - $49

08-16-2005, 05:00 AM
Thanks for the pointers. Thats great!