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Old 06-03-2010, 04:28 PM   #1
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Default what is the correct procedure for charging and running nimh reciever packs?

what is the correct procedure for charging and running nimh reciever packs? i usually charge my 1600mah @ 2amps...i was told thats too much?...i also top it off after every use!...i was told that is not good for the battery?
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Old 06-03-2010, 04:35 PM   #2
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Charge at 1 amp if you have time. 2 amps should be reserved when you don't have time. Top off after about 30 minutes of use.
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Old 06-03-2010, 04:44 PM   #3
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ok sounds good....i have only had my battery for a couple months...i have some crazy digital massive tourqe steering servo and a hitec 645mg for throttle and have had no problems until recently i would run a practice and top off then another 1 and top off and then get half way through the qualifier and my steering would start gliching first then if i dont leave it alone and take it off the track the throttle glitches and then the dreaded runaway....it seems to be getting worse!...i have no glitches on the box but as soon as i put it on the ground it has a mind of its own!...i really hope its just the battery?
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Old 06-03-2010, 04:57 PM   #4
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I have had a bad battery cause glitching before. You may have cooked the battery from repeated 2 amp charging and topping off.

You should be able to run 3 qualifiers on a single charge with a 1600 batt. If not then something is wrong. I run dual Airtronics high torque servos for over 45 minutes on a single charge. Try a new battery and only charge it at 1 amp. Stop topping it off all the time.
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Old 06-03-2010, 05:00 PM   #5
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lol i know i just wanted to make sure i never get a runaway and now im dealing with it...damn it lol
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Old 06-03-2010, 05:08 PM   #6
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dont forget to add the rubber band , incase your battery goes bad and it will prevent a runaway.

i whould just tried one rubber band, two seem to strain the throttle servo.\\


not regular rubber bands thin, ones like gmk or ouchless hair bands.
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Old 06-03-2010, 05:24 PM   #7
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+1 on the ouchless bands saved me more than once. Check all your batt connections plug in the batt direct no switch pad your rec., do a radio check. Have some watch your servos get a good distance away.
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Old 06-03-2010, 05:25 PM   #8
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.6 amps
and drain it using a 12v car light bulb before you recharge for the next race day

discharging it once a week will be fine and allow you to just top it off between rounds
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Old 06-03-2010, 05:27 PM   #9
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Quote:
Originally Posted by JayL View Post
.6 amps
and drain it using a 12v car light bulb before you recharge for the next race day

discharging it once a week will be fine and allow you to just top it off between rounds
how do you drain it with a light bulb
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Old 06-03-2010, 05:38 PM   #10
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i have had both of my orion packs for more then a year. Never had any problems what so ever. But i always charge at 1 amp only. In the very rare occasion that i have to hurry 1.3 and thats it.
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Old 06-03-2010, 07:11 PM   #11
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Nihm batteries can get sketchy sometimes. I've had 1500mah packs turn into 125mah packs in the middle of a main for no reason.

So I switched to 2s lipo. Then my lipo regulator would cause glitching.
So then I put in 2 Hitec 7955 servos and setup unregulated. Haven't had a problem since.

So the proper NIHM procedure for charging and running blah blah blah, is: Garbage can.
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Old 06-03-2010, 08:01 PM   #12
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nimh deffenetly isnt' the tecnology today, but they still arn't 8tracks of battery's.. YET.

i have 2 packs of custom AA cells, 2500's. one is going strong.. always taking 2200mah each charge. the other.. not so good. 300-400 mah. junk.

you can't over-discharge nimh or nicd. they say .9v a cell. so on a hump pack, thats 4.5 volts.

if your battery is 1000mah.. 1amp.
1500mah... 1.5amp.
2000mah, 2amps. so on. less is always better. but always charge before your race, if not possible.. night before.

nimh and nicd discharge overnight on their own.. they won't last on the shelf forever. the more times you don't run the hump pack down to 4.5, say charge on the go.. 1/2 charges.. yoru hurting the memory in the cells.

lipo is the ticket. even lifepo4's.. but they have their rules as well.

nimh/nicd don't last forever.. you might need to buy a new pack. good luck.
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Old 06-03-2010, 08:19 PM   #13
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You don't run a failsafe? or DSM????
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Old 06-03-2010, 08:21 PM   #14
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yes but failsafe doesnt help if the rx battery dies!...and my throttle servo is stronger than my return spring!
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Old 06-03-2010, 08:38 PM   #15
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cycle the pack a few times - solder a spare rx lead to a 12v car light bulb - discharge until the light turns off and then peak. repeat this a few times and you should be good to go.
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