for the following reasons
1. The power bank is low, prompting to charge.
2. When some charging banks are in working state, they will flash lights to remind them.
3. If charging is abnormal, check the charging circuit. A Charge Pal is a device that can charge a mobile device directly and has its own storage unit. At present, the main categories of the market are multi-functional charging treasure, basically configured with standard USB output, which can basically meet the current market common mobile devices mobile phones, MP3, MP4, PDA, PSP, Bluetooth headphones, digital cameras and other digital products