Section 13Performance and Safety 61Caring for the BatteryProtecting Your BatteryThe guidelines listed below help you get the most out of yourbattery’s performance. Use only Sprint approved batteries and desktop chargers. These chargersare designed to maximize battery life. Using other batteries or chargersvoids your warranty and may cause damage. In order to avoid damage, charge the battery only in temperatures thatrange from 32º F to 113º F (0º C to 45º C). Don’t use the battery charger in direct sunlight or in high humidityareas, such as the bathroom. Never dispose of the battery by incineration. Keep the metal contacts on top of the battery clean. Don’t attempt to disassemble or short-circuit the battery. The battery may need recharging if it has not been used for a longperiod of time. It’s best to replace the battery when it no longer provides acceptableperformance. It can be recharged hundreds of times before it needs replacing. Don’t store the battery in high temperature areas for long periods oftime. It’s best to follow these storage rules:Less than one month:4º F to 140º F (-20º C to 60º C)More than one month:4º F to 113º F (-20º C to 45º C)Disposal of Lithium Ion (LiIon) Batteries For safe disposaloptions of your LiIon batteries, contact your nearest Sprint-authorized service center.Special Note: Be sure to dispose of your battery properly. In someareas, the disposal of batteries in household or business trash maybe prohibited.