Battery for flashpoint is dead?

[tecboy]

I forget to turn off the battery pack. The battery is drained out. Is it dead? It seems I can't recharge any more.

 

[tecboy]

I think what has happened when I put my battery pack in the light case, the pressure inside the light case must have flipped the switch on.

 

[benhasajeep]

You might try starting a charge cycle many times. The charger is probably reading zero and will not charge it. But if you can get a little energy in it. It might then take a charge. I have gotten ni-cad, and ni-mh batteries to come back from the dead. Has not always worked. If you lost a cell only replacement of that cell will fix it (or whole battery).

 

[john.margetts]

My Kindle was allowed to go completely flat - not used for 18 months or so. It took two days of charging to admit it was flat and a third day to actually charge it.

Sent from my 8070 using Tapatalk

 

[KmH]

Both the type of battery and the design of the charger will determine if you can or can't re-charge a completely discharged battery.

 

[benhasajeep]

Are you slightly mechanically inclined?

If so, you can try to parallel 2 batteries of the same voltage. Not sure what the flashpoints produce. But for example Ni-CD - Ni-MH AA are 1.2 v. If you parallel a good charged battery with a dead battery of the same size (positive - positive, negative-negative). Current from the one will flow into the other. From what I have read a fully discharged battery may form crystals between the cells. And doing this parallel for 20-30 second might clear the crystals (they will heat up and melt). With the shorts cleared, the batter pack might take a charge the normal way.