Furthermore, refrain from storing a battery that has been charged because the cells will move and erupt at different rates, and the pack will become unbalanced.
Instead, have a 'storage charge' of 3.85 volts before placing the battery in storage. This will give the cell enough voltage to be stored for long periods of time, if needed. This type of battery cell discharges at a consistent rate and have a better balance of power during use.