A. Please charge the battery when the capacity of the battery is too low to provide a normal working voltage for the device. This is a normal phenomenon. NotE. Under low-voltage projection, “LOW BATTERY”is set for protecting the battery lifespan. B. If charging the device does not resolve the problem, restart the device. C. If this problem occurs when using high power, check whether the battery is a high-rate battery. Because if the battery rate is not enough, low power will occur. D. The internal component or circuit board is damaged due to the entry of water, leakage or dropping of the device, causing the system to exhibit abnormalities. E. When not in use for a long time, please turn the device off. It is recommended to charge the device at least once a month.