Your new battery comes in a discharged condition and must be charged before use. Upon initial use (or after prolonged storage period) the battery may require two to three charge/discharge cycles before achieving maximum capacity.
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If the battery is not going to be used for more than a month, it is recommended that it be removed from the device and stored in a cool, dry, clean place. It is normal for a battery to become warm during charging and discharging. A charged battery will eventually lose its charge if unused. It may therefore be necessary to recharge the battery after a storage period. For best charging habits and for how to avoid deep discharge cell damage, click here.