Custom MAKITA battery by watching this video. I bought this battery case from China, costs $10. It is 18V 6Ah battery case with PCB that have balancing feature. It isn't MAKITA original battery case, but it can power the MAKITA 18V tools. The total cost for this battery is $40. Lithium-ion battery cell - Brand model: LG INR18650HG2 - Standard capacity: 2800- 3000mAh - Rated voltage: - Charging voltage: 4.2± - Maximum continuous discharge current: 20A - Discharge cut-off voltage: - Weight: - Size: ×65.2 mm - Charge and discharge times: 500 times You can find this product I hope you find this video useful and enjoy it! Furthermore, I am happy to receive feedback, suggestions to improve myself. !!! I'm sorry for the mistake if I did in this video !!! Thank you very much for your likes, comments, and subscription! Have a nice day Gear Show