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Old 10-18-2002, 05:14 PM   #1
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Default How do you store your batteries?

Hi there,
i recently bought some batteries
2400mah Eagle Racing NI-CD batts, and i was just wondering should i completely discharge them after ever run i have with them? Previously i have been using my batts till they die in the car, then chuck a 0.15A fan on it, and let it run until it fully stops before recharging the battery again.

Also how about when i'm not using them for a week, or a month say? I' read somewhere that just discharge down to 5.4 V ... is that right? and what is the benifit of discharging to 5.4V and not down to 0 or close to it.

Thanks in advance for your reply guys
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Old 10-18-2002, 06:19 PM   #2
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For nicad cells, I always use them until they start to slow down, if you completely dump them in your car it hurts the cells. Next I put them on my T35 at 20A to take them down to 5.4 volts, and then put them on a tray for half an hour. After this you can run them again or store them.
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Old 10-18-2002, 07:05 PM   #3
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Just assuming the T35 is some sort of dischargin device..
just wondering what can i use to discharge it.
I've been using a 0.15 amp fan in the past, and have learnt i should be discharging at roughtly how much output the batts give out to the car.. So the batts retain its memory.
Seems like i've learnt a lot today about batts.
So just can i plug in any device which runs @ 20 amps?
I'm just trying to find an alternative product, would like to avoid spending the big bucks.

Thanks for the help
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Old 10-18-2002, 07:21 PM   #4
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You can make a string of 10 2A lightbulbs. Hook it up to these until the lights start to dim, and then if you dont have a discharge tray you definately want one. These usually run around 25 dollars, Trinity, Pro-Match and a few other companies make them.
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Old 10-18-2002, 09:38 PM   #5
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Just to let you know, the cells will benefit if you do NOT discharge them below 0.9V. If a pack(cells electrically in series) is taken down to 0V, you are very likely to reverse polarity a cell. This happens when a cell has already discharged all its energy and just carries the current from the other cells. That is very very bad for the cell. A tray will dicharge each cell individually and it is then safe to bring a cell to 0V. Now 0.9V per cell equals 5.4V per pack (6 cell pack). You should not need to discharge below this point. And it is better to trickle charge your cells at 1/10 their capacity (170 mA for 1700 and 240 mA for 2400, etc.) for 14 hours (1.4 times their capacity divided by charge rate). Also, it is better to charge and discharge a pack only once a day (for nicads).
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Old 10-24-2002, 10:31 AM   #6
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eh...guys is it necessary to discharge NiMh cells after races??
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Old 10-24-2002, 10:56 AM   #7
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It's not necessary, but I like to do it after the meeting - make sure you are using a discharger with a cutoff i.e. 0.9v per cell, because NimH's do not like going down to 0v.
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Old 10-24-2002, 12:10 PM   #8
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thanks for yr reply......
btw do u noe which kind of discharger perform that??
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