Samsung Galaxy NX500 Camera User Manual (en)

Appendix > 
Maintaining the camera
Notes about charging with a computer connected
Use only the provided USB cable.
The battery may not charge when:
You use a USB hub.
Other USB devices are connected to your computer.
You connect the cable to the port on the front side of your computer.
The USB port of your computer does not support the power output standard  
(5 V, 500 mA).
Handle and dispose of batteries and chargers with care
Never dispose of batteries in a fire. Follow all local regulations when you 
dispose of used batteries.
Never place batteries or cameras on or in heating devices, such as 
microwave ovens, stoves, or radiators. Batteries may explode when they 
are overheated.