Zte Optus X Start 4 User Manual page 60

products.
 Do not carry your phone in your back pocket as it could
break when you sit down.
Battery Safety
 Using ZTE-unapproved or incompatible battery, charger
or power adapter may damage your device, shorten its
lifespan or cause a fire, explosion or other hazards.
 The recommended operating temperatures are 0 °C to
35 °C and the storage temperatures are -20 °C to +45
°C. Extreme temperatures can damage the device and
reduce the charging capacity and lifespan of your device
and battery.
 Do not place the device or the battery in or near heating
equipment, such as microwave ovens, stoves or
radiators or on soft surfaces which retain heat. Keep the
device and the battery away from heat and direct
sunlight. If not, the device or the battery may overheat
and cause explosion or fire.
 Please disconnect the charger when the battery is fully
charged. Overcharging may shorten the battery life.
 Do not short-circuit the battery, as this can cause
excessive heat and fire.
 Do not throw the battery into a fire to avoid explosion.
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