49
•  
Do not damage the battery or expose it to high external 
pressure. Doing so may lead to a short circuit or overheating. 
•  
Do not drop the device or battery. Doing so may damage the 
device or battery.
•  
If the device standby time shortens significantly, replace the 
battery.
•  
The device has a built-in, non-removable battery. Do not 
attempt to remove it. Doing so may damage the device. To 
replace the battery, take the device to an authorised service 
centre. 
Cleaning and maintenance
•  
Keep the device and accessories dry. Do not attempt to dry it 
with an external heat source, such as a microwave oven or 
hair dryer.
•  
Do not expose your device or accessories to extreme heat or 
cold, which may interfere with proper function and may lead 
to fire or explosion.
•  
Avoid collision, which may lead to device malfunctions, 
overheating, fire, or explosion. 
•  
Before you clean or maintain the device, stop using it, close all 
applications, and disconnect all cables connected to it.
•  
Do not use chemical detergents, powders, or other agents 
(such as alcohol or benzene) to clean the device or 
accessories. These substances may cause damage to parts or 
present a fire hazard. Use a clean, soft, and dry cloth to clean 
the device and accessories.
•  
Do not place magnetic stripe cards, such as bankcards and 
phone cards, near the device for extended periods of time. 
Otherwise, these cards may be damaged.
•  
Do not dismantle or attempt to modify the device or its 
accessories. This voids the warranty and releases the 
manufacturer from liability for damage. In case of damage, 
contact an authorised service centre for assistance or repair.