I bought this battery case from China cost $15. It isn't MAKITA original battery case. It is 18V 9Ah battery case with PCB model BL18XXR1. I don't know why this PCB connected only 3 wires B-, B+ and B1. Let see how long the battery last. If you have experience with this, please share it with me in the comment section.
- BL1890 Battery Case PCB Charging Protective Board Shell Box For MAKITA 18V BL1860 9.0Ah LED Li-ion Battery Indicator
- PCB BL18XXR1 more detail in Google
Lithium-ion battery cell
- Brand model: LG INR18650HG2
- Standard capacity: 2800- 3000mAh
- Rated voltage: 3.6V
- Charging voltage: 4.2±0.05V
- Maximum continuous discharge current: 20A
- Discharge cut-off voltage: 2.5V
- Weight: Max.47.0g
- Size: Max.18.2×65.2 mm
- Charge and discharge times: 500 times

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