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use. Do not leave the battery connected to a charger for more than a week.
Overcharging may shorten its lifespan.
• Extreme temperatures can affect the ability of your battery to charge.
Battery needs the fit temperature. If the surrounding temperature is over
40°C, the battery cannot be charged.
• Use the battery only for its intended purpose. Never use any charger or
battery that is damaged.
Do not short-circuit the battery. Accidental short-circuiting can occur when
a metallic object such as a coin, clip, or pen causes direct connection of the
positive (+) and negative (-) terminals of the battery. (These look like metal
strips on the battery.) Short-circuiting the terminals may damage the
battery or the connecting object.
• Leaving the battery in hot or cold places, such as in a closed car in
summer or a freezer in winter conditions, will reduce the capacity and
lifetime of the battery. Always try to keep the battery between 59°F and
77°F (15°C and 25°C). A hot or cold battery may not function temporarily,
even when the battery is fully charged.
• Battery performance is particularly limited in sub-zero temperatures.
• Do not dispose the battery into a fire! Dispose off the battery according to
the local regulations. Please recycle whenever possible. Cell phones are not
considered household waste.
• Caution: This phone has dual batteries. There is a switch near main
battery inside the phone. Push this switch; you can shift it into dual batteries or single battery.
Mobile phone maintenance
• Keep the device dry. Precipitation, humidity, and all types of liquids or
moisture can contain minerals that will corrode electronic circuits. If your
device does get wet, remove the battery and allow the device to dry completely before replacing it.
• Do not use or store the device in dusty or contaminated areas. Its moving
parts and electronic components can be damaged.
• Do not store the device in hot areas. High temperatures can shorten the
life of electronic devices, damage batteries, and warp or melt certain
plastics.
• Do not store the device in cold areas. When the device returns to its
normal temperature, moisture can form inside the device and damage
electronic circuit boards.
• Do not attempt to open the device other than as instructed in this guide.