Description
BL18120 15x21700 Battery Case + 50A BMS for Makita 18V (DIY Kit)
High-Discharge 15 Cell DIY Battery Shell with Integrated Protection PCB
This DIY battery case is designed for building a high-capacity Makita 18V compatible battery pack using 15 pieces of 21700 high-discharge lithium-ion cells.
Main Features
- Designed for 15 pieces of 21700 lithium-ion cells
- Integrated 50A discharge protection BMS
- High discharge capability for tools up to 900W
- Overcharge protection
- Over-discharge protection
- Overcurrent protection
- High compatibility with Makita 18V platform
Compatible With
- BL1830
- BL1850
- BL1860
- BL18120 style builds
Technical Notes
- Discharge protection rating: 50A
- Designed for high-drain 21700 cells only
- Ensure all cells are voltage matched before assembly
PCB color, LED color, and labeling may vary by production batch. Functionality and performance remain the same.
What’s Included
- 1x BL18120 style plastic battery shell
- 1x Integrated 50A BMS PCB
This product is intended for experienced battery builders. You must have spot welding equipment, testing tools, and proper knowledge of lithium-ion battery assembly.
Disclaimer
This is an aftermarket DIY component. Not an original Makita product. No battery cells included.
Safety Warning for Lithium-Ion Battery Usage
Customers should have a clear understanding of lithium-ion battery handling and safety before making a purchase. Lithium-ion batteries are highly sensitive and may pose fire, burn, or explosion risks if improperly handled.
By purchasing, you assume full responsibility for any injury, damage, or loss arising from incorrect use or handling. Only assemble using proper tools and correct high-drain 21700 cells.
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Let customers speak for us
I purchased some of these tabless cells to try on my 1S 3" HD Toothpick drone build, and, albeit a bit heavy for 1S, it flies pretty well. Not a freestyle monster, but an endurance beast with decent send. These cells shrug off the demands of a BETAFPV Matrix HD AIO flight controller/12A ESC and some 1202.5 11000KV motors. I'm getting 15+ minutes of speedy flight time from a single cell trying not to go below 3.2V, and about 20+ minutes cruising. Love these cells and will definitely buy more when time comes, only from DIY500AMP, who are terrific!
