For battery cells, review the product description for real-world current recommendations, testing notes, and application guidance. Manufacturer maximum ratings should be treated as limits, not the best target for long-term pack health.
Description
21700 Plastic Case + BMS PCBA for Makita 18V Li-ion Battery (DIY Kit)
DIY Semi-Manufactured Battery Enclosure with Integrated BMS
This product is a 21700 battery shell with integrated BMS PCBA, designed for building a Makita 18V compatible lithium-ion battery pack. It is intended for experienced DIY builders who understand lithium-ion battery assembly and safety procedures.
Important: This product includes the plastic case and PCB only.
No battery cells included.
Product Overview
This enclosure allows you to build a 10-cell 21700 lithium-ion battery pack configuration. The integrated BMS includes balanced charging functionality and multiple protection features to help ensure safe operation and extend pack lifespan.
BMS Features
- Built-in IC for individual cell voltage detection
- Balanced charging function
- Overcharge protection
- Over-discharge protection
- Overcurrent protection
- Overvoltage protection
- Overheat protection
The balancing function helps keep each cell at a consistent voltage level, improving pack efficiency and supporting longer service life.
Technical Specifications
- Designed for 10 pieces of 21700 lithium-ion cells
- Compatible with Makita 18V platform (aftermarket / DIY use)
- Integrated BMS PCBA
- LED indicator included
Batch / Inventory Notice:
PCB color may vary (blue, white, green, red, etc.). LED color may vary (red, green, or blue).
PCB design, version, and labeling may change between batches while maintaining the same function and performance.
Requirements Before Purchase
This is a DIY battery assembly component. To use this product properly, you must have:
- 21700 high-drain lithium-ion cells
- Spot welder
- Soldering tools
- Multimeter
- Proper lithium-ion charger
- Battery pack building knowledge and experience
Very Important: Ensure that the voltage of each 21700 cell is the the same before welding the PCB.
What’s Included
- 1x Plastic battery case
- 1x Integrated BMS PCB
Not Included: Battery cells, charger, tools, or any other accessories.
Advance Notice (Read Carefully)
- Product images are for reference only. Actual size/color may vary slightly.
- PCB label may not match the photo and may change by batch.
- If you have objections to color differences, label differences, or PCB design changes, please do not purchase.
Important Disclaimer
This is not an original Makita product. This is an aftermarket DIY component.
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. Always charge batteries on fire-resistant surfaces, and never leave them charging unattended.
By purchasing, you assume full responsibility for any injury, damage, or loss arising from the incorrect use or handling of lithium-ion batteries or chargers. Compatibility with specific devices is not guaranteed. Only charge using a smart charger designed specifically for this battery type, and do not mix old or used batteries with new ones.
Important Usage Guidelines:
- Not for Use in E-Cigarettes or Similar Devices: Lithium-ion batteries present a serious risk of injury, property damage, or even death if improperly used.
- Risk of Fire and Explosion: Misuse can cause batteries to ignite, explode, or release harmful gases.
- Always Use in a Protected Pack: Ensure batteries are used within intended specifications and supported by appropriate circuitry.
- Proper Storage and Handling: Store batteries in protective cases, away from metal items to prevent short circuits.
- Inspection Prior to Use: Do not use batteries with damaged wrappers, torn insulators, or visible damage.
- Follow Manufacturer's Charging Specifications: Avoid overcharging or over-discharging, and never alter, dismantle, puncture, crush, or burn.
- Heat and Water Precautions: Do not expose batteries to high temperatures or any liquids.
- Assembly Guidelines: Batteries should only be spot welded; do not solder directly onto battery terminals.
Users are expected to have battery-handling knowledge before purchasing. By using these batteries, you acknowledge that usage is solely at your own risk, and you take full responsibility for any resulting consequences.
For Resellers: Please ensure all safety information is passed along to end users to promote safe handling and proper use.
Orders ship from Florida when inventory is available. Lithium-ion cells require proper handling, protected packs, correct chargers, and safe storage. Do not solder directly to battery terminals.
Payment and Security
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Let customers speak for us
Wow, these cells are great!
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!
VN in AZ
EVE 30PL 18650 3000mAh 60A Battery Cell - Tabless
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