wb9k
10 kW
Hi all,
Haven't been around much lately, and haven't had time to read this thread thoroughly, but here is the LV bottom line for A123 cells.
They can go as low as .5 Volts essentially forever and suffer no ill effects. A cell that has been below 300 mV (call is 500 mV for some safety buffer) AT REST for any length of time should be scrapped. Don't even attempt to use it. It may charge up and even hold a charge reasonably well at first, but every charge cycle brings added risk of a catastrophic failure in the form of an internally shorted cell. I've explained the mechanism responsible here before elsewhere.
1 Volt? No worries AT ALL, you're perfectly fine. Charge and enjoy.
Haven't been around much lately, and haven't had time to read this thread thoroughly, but here is the LV bottom line for A123 cells.
They can go as low as .5 Volts essentially forever and suffer no ill effects. A cell that has been below 300 mV (call is 500 mV for some safety buffer) AT REST for any length of time should be scrapped. Don't even attempt to use it. It may charge up and even hold a charge reasonably well at first, but every charge cycle brings added risk of a catastrophic failure in the form of an internally shorted cell. I've explained the mechanism responsible here before elsewhere.
1 Volt? No worries AT ALL, you're perfectly fine. Charge and enjoy.