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.
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!