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Old Aug 25, 2004, 06:44 PM
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How do i keep my batteries in shape without spending money?

Ive got a hobbico mk2 field charger. It charges 2 batterys at 2Amp max.
All my packs are over 2000mah, so i just leave it on 2A all the time.

What should i do to keep my batteries peforming well?
I thought i should discharge the batteries fully before another charge, so i hooked up a PC fan to one of my batteries over night, it only draws 0.18A so im not sure if i need to be discharging at a higher rate or not.

Please give me some tips, without suggesting i buy a better charger, i dont wanna spend any more money on this hobby right now, maby in a few months
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Old Aug 25, 2004, 06:58 PM
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Try to keep your batteries cool and not overload them. U will need a AFI whatmeter to check the right prop load and not over discharge and overheat your batteries.
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Old Aug 25, 2004, 07:09 PM
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What makes you think you need to discharge your batteries?
..a
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Old Aug 25, 2004, 07:36 PM
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Andy is right. The only reason to discharge any battery is to check capacity. Discharging them and then charging them only adds another cycle to the batteries, and over time this 'cumulative cycling' will only reduce life. Was there a reason you discharged your packs?
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Old Aug 26, 2004, 04:31 AM
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What about battery memory? Should i just fly them in my plane as usual until they are run out and then charge them again? There is always some juice still left in there. And sometimes i might only use half a battery, and i dont like taking off on half a battery
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Old Aug 26, 2004, 05:52 AM
RIP Ric
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Marietta, GA
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In our applications (and virtually any other, for that matter), there is no such thing as "memory" in batteries. You just recharge when necessary, regardless of current charge state. Of course, you can't use a timer to determine how long to charge, you need a proper peak detection charger (for NiCd/NiMH)..
..a
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Old Aug 27, 2004, 01:22 AM
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ok, from my experience with electric r/c cars.
it is benificial to dicharge NiCd's before you recharge them, this is because they have a memory effect and if you dont you will get less capacity over time.
NiMh's dont need discharging because they do not have that memory effect. but it is still good to discharge them. discharging WILL prolong the life of your batteries.
i charge 1400 NiCd's at 4amps and they perform fine, i dont see why you couldnt charge at higher amperes. i charge my 6cell GP3300's at 5 amps. mostly because of the time between races
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Old Aug 27, 2004, 01:25 AM
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and there IS such thing as a memory effect, but only in NiCd's
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Old Aug 27, 2004, 02:40 AM
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Quote:
Originally Posted by adamkerrnz
and there IS such thing as a memory effect, but only in NiCd's
http://www.repairfaq.org/ELE/F_NiCd_Memory.html

interesting read
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Old Aug 27, 2004, 06:57 AM
RIP Ric
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Quote:
Originally Posted by adamkerrnz
and there IS such thing as a memory effect, but only in NiCd's
Quote:
Originally Posted by Andy W
In our applications (and virtually any other, for that matter), there is no such thing as "memory" in batteries.
..a
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Old Aug 27, 2004, 07:26 AM
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Ok thats cleared that up then. Thats good
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