•  
Do not smash or pierce 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. If the device or battery 
is dropped, especially on a hard surface, it may be 
damaged. 
•  
If the device standby time shortens significantly, replace 
the battery.
•  
The device has a built-in, non-removable battery. Do not 
attempt to remove the battery, otherwise the device may 
be damaged. To replace the battery, take the device to 
an authorized service center. 
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. These environments 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, 
stop all applications, and disconnect all cables connected 
to it.
•  
Do not use any chemical detergent, powder, or other 
chemical agents (such as alcohol and benzene) to clean 
the device or accessories. These substances may cause