What is the best way to store a laptop battery when not in use?
they are not all the same but some really hate it when the voltage drops to low, odds are its best to keep it charged "ish". on each one you will see the lettering to say what the unit is composed of like "Ni Mh" ect enter that in to Google with "maintenance storage" to find out what best for the one you have. ie "ni mh maintenance storage"
If you remove the battery from the laptop and store it accurately, there is a good chance that it will be in good condition when you need it next time.Don’t store a laptop battery that is almost empty. Stored batteries continue losing energy, albeit at a much slower pace. If the stored battery is totally discharged, it could be destroyed.Don’t store a fully charged battery. Fully charged batteries deteriorate faster than half-charged batteries. Most articles I’ve read recommended storing laptop batteries with a 40–60% charge.
Store the battery at a low temperature and a dry place. A moist environment will accelerate discharging the battery. I usually put it in the fridge. It keeps my battery fresh and crisp. Check out this table at Wikipedia. 0°C (32°F) seems to be the best storage temperature.Check the battery state every now and then. I would remove it from the fridge at least every 30 days to calibrate it.
Let the laptop batteries warm up a little before you put it back into your laptop. If the temperature is raised too fast, it will strain the battery.I hope the battery information can keep you using your laptop best.