Makita 18V 5Ah BL1850B Li-Ion Battery – Fits BL1860 BL1840B
Makita 18V 5Ah BL1850B Li-Ion Battery – Fits BL1860 BL1840B
Makita 18V 5.0Ah Lithium-Ion Battery (BL1850B) – Genuine Fit for LXT Power Tools
Keep your Makita 18V power tools running longer with this high-capacity 5.0Ah lithium-ion battery. Compatible with a wide range of Makita LXT tools, this battery delivers extended runtime, rapid charging capability, and intelligent built-in protection — so your workflow stays uninterrupted. Made in Mainland China.
Key Features
- High Capacity – 5.0Ah / 18V: Provides up to 2.3× more runtime per charge compared to a standard 3.0Ah battery, keeping you productive for longer stretches.
- Advanced Cell Balancing: Upgraded circuit board with single-cell balance detection ensures every cell charges and discharges evenly, maximising lifespan and performance.
- Built-In Smart Protection: Integrated CPU and memory chip automatically optimises charging cycles. Safeguards against incorrect voltage, short circuit, and internal overheating.
- LED Charge Indicator: Instantly see remaining battery level at a glance — no guesswork, no downtime surprises.
- Durable Construction: High-quality shockproof casing designed to withstand tough job-site conditions.
- Wide Compatibility: Works with Makita 14.4V–18V Li-Ion tools and a broad range of BL-series batteries (see full list below).
- Certified: FCC, RoHS, CE, PSE, and TÜV certified for safety and reliability.
Specifications
| Battery Type | Lithium-Ion (Li-Ion) |
| Nominal Voltage | 18V |
| Nominal Capacity | 5.0Ah (5000mAh) |
| Weight | 570g |
| Charger Input | 110V – 240V (Universal) |
| Charger Output | 14.4V–18V DC 3A |
| Compatible Voltage Range | 14.4V – 18V Li-Ion |
| Model Number | MT-18V (BL1850B) |
| Certifications | CE, FCC, RoHS, PSE, TÜV |
| Country of Origin | Made in Mainland China |
⚠️ Note: Not compatible with 10.8V lithium battery chargers. Please ensure your charger is rated for 14.4V–18V before use.
Compatible Battery Codes
194204-5, 194205-3, 194309-1, 194230-4, BL1815, BL1830, BL1840, BL1845, BL1850, BL1860, LXT400, BL1415, BL1430, BL1440, BL1445, BL1460
Compatible Makita Power Tool Models (18V)
BDF453SHE, BDF454Z, BHP452, BML184, BML185, BST221Z, BTDW251Z, ML185, TD140D, TW251D, BCS550 / BCS550Z, BDA350 / BDA350Z, BDF451 / BDF451Z, BFR550L / BFR550Z, BFR750 / BFR750L / BFR750Z, BFS450 / BFS450RFE / BFS450Z, BGA452 / BGA452Z, BHP451 / BHP451SFE / BHP451Z, BHP453 / BHP453SHE, BHP454 / BHP454Z, BHR202 / BHR202RFE / BHR202Z, BHR240 / BHR240Z, BHR241 / BHR241Z, BJR181 / BJR181X / BJR181X1 / BJR181Z, BJR182, and many more Makita 18V LXT tools.
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Frequently Asked Questions
Q: Is the Makita BL1850B 18V 5Ah battery compatible with my existing Makita LXT charger?
A: Yes — this battery is designed to work with Makita 14.4V–18V Li-Ion compatible chargers with an output of 14.4V–18V DC 3A and an input of 110V–240V. It is NOT compatible with 10.8V chargers. Always verify your charger's voltage rating before use.
Q: Which Makita battery models does the BL1850B replace?
A: The BL1850B is compatible with and replaces a wide range of Makita BL-series 18V batteries including BL1815, BL1830, BL1840, BL1845, BL1850, BL1860, BL1860B, BL1840B, and corresponding 14.4V models such as BL1415, BL1430, BL1440, BL1445, and BL1460.
Q: What protection features does this battery include?
A: This battery features built-in circuit protection against overheating, short circuits, incorrect voltage, overcharging, and deep discharge. It also includes a built-in CPU and memory chip for automatic charge optimisation, plus single-cell balance detection for extended battery life.
Q: How long does the battery last per charge compared to smaller capacity batteries?
A: With a 5.0Ah capacity, this battery provides approximately 2.3× more runtime per charge than a standard 3.0Ah Makita battery, making it ideal for extended or heavy-duty tool use on the job site.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.