The new custom battery has the below advantages:

1. Will be much more volume, updating from 800mAh to 1000mAh

2. Will be a smaller size

3. Will be less weight

4. With a built-in charging and protection circuit

5. With an RGB LED to indicate the battery's status.

6. NO need for a separate charger anymore.

Disadvantage:

Need R&D resources to design, certification and of course the budget, but it's none of your business:) we want to upgrade this feature as a gift for all your support!