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VictorPS said:If I have:
1. Li-ion
2. Ni-Mh
3. Ni-CD
4. Seal Lead Acid
If I am not going to use them for a long time >1 year,
what shall I do before I keep them in store room?
To full charge it, or discharge it, or maintain their charge periodicaly?
Kindly explain.
There is no simple answer. Probably just running it down until the device shuts off, then putting on the charger for much less than it normally takes. Or if your device has a charge meter use that.VictorPS said:Maintain 40% charge for Li-ion is a challenge to me.
Normally, how we know it is 40%?
It depends on charge state. For example a battery that was run down to 10.5v, a 1 amp charge might only bring it up to 10.8v at first. A charge rate of 1/60th the capacity (C/60 charge) does not raise the battery voltage much. You'll probably see 13.8v only when fully charged. If you were trying to charge it at 20A it would reach 13.8v as a much lower state of charge.VictorPS said:My solar (18V 10W x2) is connect parallel and charge a SLA 12V 60AH .
When measure the terminal voltage, it is 12.7V only.
So the battery is not consider charging?
Charging must happend on 13.8V only? :?: