A
Anonymous
Apr 07, 2026
Rating: 4/5
Good but instructions vague
Board works well but wiring diagram could be clearer for beginners.
Description
Trendy premium product with guaranteed quality
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Cell Series Configuration | 5S (5 Cells in Series) |
| Nominal Voltage | 21V (18V - 21V Range) |
| Max Continuous Discharge | 30A |
| Protection Features | Overcharge, Overdischarge, Overcurrent, Short Circuit |
| Compatibility | Makita-style 18V/21V Tool Batteries |
| Balance Function | Passive Cell Balancing |
| Operating Temperature | -20°C to 60°C |
| PCB Dimensions | 60mm x 40mm x 5mm |
| Weight | 25g |
| PCB Material | FR-4 Fiberglass |
5 reviews
A
Anonymous
Mar 30, 2026
Rating: 5/5
Solid protection
Tested the cutoff voltage, it's accurate. Good build quality for the price point.
A
Anonymous
Mar 09, 2026
Rating: 5/5
Reliable BMS
Been using it for 3 months in a custom pack. No issues with balance or cutoff.
A
Anonymous
Feb 19, 2026
Rating: 5/5
Fits Makita casing
Dimensions are spot on for the replacement shell I bought. Highly recommend.
A
Anonymous
Feb 01, 2026
Rating: 5/5
Perfect for custom packs
Works great for my DIY drill project. Soldering points are clear and easy to work with.
5 FAQ
Q: What is the idle current consumption?
A: Typically less than 50uA in storage mode.
Q: Can I use this for LiFePO4?
A: No, this is calibrated for standard Lithium-Ion voltage ranges.
Q: Does this support 18650 cells?
A: Yes, designed for 5x 18650 lithium-ion cells.
Q: Is there a balance wire included?
A: Wires are not included, you need to source your own balance leads.
Q: Does it have a temperature sensor?
A: This model does not include an NTC temperature sensor input.
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