... electrical energy and stored in the built-in capacity of 2600mA / h lithium battery and then in the case of the built-in lithium battery power ... that the battery is fully charged.Method 2,Solar charger, place under the sun, can the internal built-in battery charging, the green ... , can be filled with about 16 hours in the sun.How to use:Built-in battery is fully charged, can give mobile phones, digital ...