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Apr 21, 2013, 11:46 PM
Jim in the Desert
Thread OP
Discussion

Best way to revive A123s in storage 5 years...


I've had some 4S packs and individual cells in storage for about 5-6 years.

Should I just charge them and fly, or try to do some work on bringing them back carefully first?

I don't have a charger that can cycle batteries, or has a program to revive batteries with a very slow low charge. I have a Thunderpower 1010C and a Hyperion i610 original version. I also have a Mastech 3010E triple PS and a Tenergy charger that puts from 200mah to 2a in to each cell independently through the balance connector.

I can construct a circuit to discharge cells, watching through my Power Analyzer Pro or Emeter 1.

Thanks for any knowledgeable help.

Jim
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Apr 22, 2013, 12:02 AM
Zero Expo
typeRA's Avatar
A123 cells tolerate storage very well, and should be fine to use as they are.
Apr 22, 2013, 02:19 AM
Jim in the Desert
Thread OP
Thanks!

Happen to know the mah of the Dewalt A123s?

Thanks much.
Jim
Apr 22, 2013, 02:37 AM
Zero Expo
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The 10-cell 36V batteries are 2300mAh 26650 cells.
Apr 22, 2013, 02:58 AM
Jim in the Desert
Thread OP
Never mind, answered my own question....
Last edited by cloud_9; Apr 22, 2013 at 03:31 AM.
Apr 22, 2013, 03:31 AM
Zero Expo
typeRA's Avatar
Cells in series add voltage.

Cells in parallel add capacity (Ah).

5S would be:

5 3.3V = 16.5V

5P would be:

5 2.3Ah = 11.5Ah
Apr 22, 2013, 03:33 AM
Jim in the Desert
Thread OP
Thanks once again. Think I've got it.
I have 42 new cells I bought here a long time ago. Time to put them to use.


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