About this battery system
Makita LXT is the familiar 18V slide-battery platform used across drills, impact drivers, saws and garden tools. LXT packs are distinct from Makita's 40V max XGT and compact 12V max CXT systems.
The BL1850B is rated 90Wh and approximately 45 minutes to charge with a specified rapid charger. Verify charger and tool compatibility.
Manufacturer-supported example specifications below; individual tool fitments and Amazon availability still require checking.
Battery chemistry, cells and energy
The BL1850B is a lithium-ion pack; the exact cell format and count are not specified in the referenced UK datasheet.
Energy (Wh) = nominal voltage (V) × capacity (Ah). Divide by 1,000 for kWh. These are nominal estimates, not measured usable energy or guaranteed runtime. A 90Wh pack is 0.09kWh; at an illustrative constant 90W load, ideal runtime would be one hour before losses. Real power tools draw variable power.
| Example manufacturer pack | Capacity | Nominal energy | Amazon UK |
|---|---|---|---|
| BL1850B | 5Ah | 90Wh / 0.090kWh | Find pack ↗ |
Technical reference: Manufacturer documentation ↗. Manufacturer specifications are not Amazon price or stock verification.
Choosing a replacement battery
Platform family is an initial research grouping, not a verified fitment for every tool or generation. Check exact tool model, battery part number, connector and charger compatibility. Do not assume matching voltage means interchangeable.
Genuine manufacturer packs
Look for the manufacturer's exact part number, supported charger and capacity in Ah.
Search genuine packs on Amazon UK ↗Third-party compatible packs
Check model-specific compatibility, seller identity, independent safety evidence and warranty.
Search compatible packs on Amazon UK ↗Safety and fitment
Avoid modified adapters and unverified packs; confirm BMS, protection, charging requirements and product safety documentation. Never assume that matching voltage, similar colour or an advertised adapter makes two packs interchangeable. Stop using swollen, damaged or overheating packs.