Health an• Battery charging time depends on the remainingbattery charge, the type of battery, and the chargerused. The battery can be charged and dischargedhundreds of times, but it will gradually wear out. Whenthe operation time is noticeably shorter than normal, itis time to buy a new battery.• If left unused, a fully charged battery will dischargeitself over time.ion batteries are particularly affected by temperaturesbelow 0°C (32°F).• Do not short-circuit the battery. Accidental short-circuiting can occur when a metallic object like a coin,clip or pen causes a direct connection between the +and – terminals of the battery (metal strips on thebattery). For example, do not carry a spare battery ina pocket or bag where the battery may contact metal