storing spare battery

Who would have thought that I'm still using my notebook after 3.5 years. In all that time the capacity of the battery dropped to just 3/8th of its original value. There are no more original batteries in stock, so for my new notebook I'm considering buying a reserve battery.

In order to keep it in a good state I' wondering where to store it and how often to charge it in between.

I read that heat is the battery killer No 1, followed by storing it empy-charged. So my idea would be charge it to 40%-50% and then store it in the freezer. In case of storing it in the freezer, does it need to be sealed and/or vacuumed?

Ideas?

 

Although this goes into a bit of exhausting detail, you can find some excellent information - particularly to battery storage, and ambient temps affect on capacitance - right here.

 

thanks for the link. Table 3 shows storage at different temperatures:

Temperature	40% charge	100% charge
0°C 25°C 40°C 60°C	98% 96% 85% 75%	94% 80% 65% 60% (after 3 months)

The artice speaks about capacity, so I assume the % values actually show health and not drain!?
I'd be quite interested in the drain as well over that 3 months period.

Further, some comments say freezing can actually harm the battery, so I guess the fridge would be more reasonable. But what about sealing to avoid condense?

Can anyone share some real life experience?

 

found an old thread from 2006 about http://forum.notebookreview.com/har...pgrades/84817-spare-battery-care-feeding.html