Before charging the battery:

The rechargeable battery was disconnected at manufactory for transportation safety.

 Please re-plug the battery to the machine:

The battery charger come with the package:

Charge the built-in battery from home power out-let:

The indicator on the battery charger will turn from RED to GREEN when the rechargeable battery is fully charged. For safety, a full charge time is designed to take 4-6 hours.

It is normal for the battery charger to become warm during charging of the Power Bank. 

Important tip for maintaining the battery life time:
Please fully charge the battery after each time using the machine or before store the machine for the winter. The battery, which has been run out of power, might be dead soon without being re-charged.