The built-in battery is the secondary battery (rechargeable). If you continued to charge and discharge the battery for around 300 times, the battery capacity lowers because of the feature of the battery.

 

It is replacement time for the battery, if the continuous processing time becomes half or less of the new battery (around 8 hours).

 

The replacement of the battery must be done in our factory, so please contact the distributor or our nearest office.