Topic: How to deal with infrequently used rechargeables? Wal Mart battery content...

[Roving Sign]

Sort of realized I'm not using my Wal-Mart 9V DVD battery as much as I would like...

I havent used it for...months  - and it still reads 2 lights...I hooked my Flying Calf A/D up to it - 2 hours ago - still hasn't budged...(which is good)

So the question is - how often should one cycle a battery? (charge/discharge)

Is there some sort of perscription for battery health?

And how should they be stored - charged or uncharged?

[JackoRoses]

Sort of realized I'm not using my Wal-Mart 9V DVD battery as much as I would like...

I havent used it for...months  - and it still reads 2 lights...I hooked my Flying Calf A/D up to it - 2 hours ago - still hasn't budged...(which is good)

So the question is - how often should one cycle a battery? (charge/discharge)

Is there some sort of perscription for battery health?

And how should they be stored - charged or uncharged?

iirc they should be kept with a 40% charge and stored in the fridge.
I was wondering the same thing, my lions have been sitting in the fridge since november, I will finally be using them next weekend so I will be taking them out and topping the charge off on them and hope for the best...

[esteyes]

Lithium-ion batteries can hold a charge for many months. It is best to store a lithium-ion battery with a partial or full charge. Occasionally, a lithium-ion battery with a very low charge stored for a long period of time (many months) has its voltage slowly drop below the level at which its built in safety mechanism allows it to be charged again. Somechargers can provide the ability to overcome the protection device and allow recharging. But not all can do this. So, iIf the battery is going to be stored for several months it's a good idea to take it out and recharge it after a few months.  Better yet would be to actually use the battery every few months and then leave it partially or fully charged. Remember, one good thing about LiION batteries is that they have the lowest self discharge of all the battery types we commonly use.

neil in san marcos

[jeromejello]

i was pondering the same thing... i was thinking of making some kind of power cord to power up some random device to drain it down so i can cycle the thing.