Multi-function Power Bank 2000 mah power bank

Multi-function Power Bank 2000 mah power bank Power Light: 1. Insert the charger or USB line of the computer for charging: 1) In case it is not fully charged, the four power lights will blink in circulation to indicate the charging status. 2) When the battery is fully charged, the four power lights will stay on. 2. Low voltage: When the electric quantity is lower than 3.60V, the last power light will blink fast. When it is lower than 3.45V, the device will be shut down. 3. If