154Section 11• Do not use incompatible cell phone batteries and chargers.Some Web sites and second-hand dealers, not associated withreputable manufacturers and carriers, might be sellingincompatible or even counterfeit batteries and chargers.Consumers should purchase manufacturer or carrierrecommended products and accessories. If unsure aboutwhether a replacement battery or charger is compatible,contact the manufacturer of the battery or charger.• Extreme temperatures will affect the charging capacity of yourbattery: it may require cooling or warming first.• Do not leave the battery in hot or cold places, such as in a car insummer or winter conditions, as you will reduce the capacityand lifetime of the battery. Always try to keep the battery atroom temperature. A phone with a hot or cold battery maytemporarily not work, even when the battery is fully charged.Li-ion batteries are particularly affected by temperatures below0 °C (32 °F).• Do not place the phone in areas that may get very hot, such ason or near a cooking surface, cooking appliance, iron, orradiator.• Do not get your phone or battery wet. Even though they will dryand appear to operate normally, the circuitry could slowlycorrode and pose a safety hazard.• Do not short-circuit the battery. Accidental short-circuiting canoccur when a metallic object (coin, clip or pen) causes a directconnection between the + and - terminals of the battery (metalstrips on the battery), for example when you carry a sparebattery in a pocket or bag. Short-circuiting the terminals maydamage the battery or the object causing the short-circuiting.• Do not permit a battery out of the phone to come in contact withmetal objects, such as coins, keys or jewelry.• Do not crush, puncture or put a high degree of pressure on thebattery as this can cause an internal short-circuit, resulting inoverheating.• Dispose of used batteries in accordance with local regulations.In some areas, the disposal of batteries in household orbusiness trash may be prohibited. For safe disposal options for