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not leave the battery connected to a charger for more than a
week, since overcharging may shorten its life.
• Do not use incompatible cell phone batteries and chargers.
Some Web sites and second-hand dealers, not associated
with reputable manufacturers and carriers, might be selling
incompatible or even counterfeit batteries and chargers.
Consumers should purchase manufacturer or carrier
recommended products and accessories. If unsure about
whether a replacement battery or charger is compatible,
contact the manufacturer of the battery or charger.
• Misuse or use of incompatible phones, batteries, and charging
devices could result in damage to the equipment and a
possible risk of fire, explosion, leakage, or other serious
hazard.
• Extreme temperatures will affect the charging capacity of your
battery: it may require cooling or warming first.
• Do not leave the battery in hot or cold places, such as in a car
in summer or winter conditions, as you will reduce the
capacity and lifetime of the battery. Always try to keep the
battery at room temperature. A phone with a hot or cold
battery may temporarily not work, even when the battery is
fully charged. Li-ion batteries are particularly affected by
temperatures below 0 °C (32 °F).
• Do not place the phone in areas that may get very hot, such
as on or near a cooking surface, cooking appliance, iron, or
radiator.