Knowing Performance and Safety Guidelines 121Getting Started 17 17 17 17 Navigating andEntering Text 17Caring for the BatteryProtecting your BatteryThe guidelines listed below help you get the most out ofyour battery’s performance. Use only Sprint PCS-approved batteries and desktopchargers. These chargers are designed to maximizebattery life. Using other batteries or chargers voids yourwarranty and may cause damage. In order to avoid damage, charge the battery only intemperatures that range from 32º F to 113º F(0º C to 45º C). Don’t use the battery charger in direct sunlight or inhigh humidity areas, 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 usedfor a long period of time. It’s best to replace the battery when it no longer providesacceptable performance. It can be recharged hundredsof times before it needs replacing. Don’t store the battery in high temperature areas forlong periods of time. It’s best to follow these storagerules: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)