Makita 18V 5Ah compatible battery
(4 reviews)
Replacement battery for Makita 18V LXT cordless tools (BL1850, BL1860, BL1830, BL1840). Restore your device's original runtime when the battery gets tired.
Buy at AmazonAs an Amazon Associate I earn from qualifying purchases.
Characteristics
- Capacity: 5.0 Ah
- Compatibility: Makita
- Type: Li-ion 18V
- Use: Replacement battery
- Original runtime restored, Makita
Detailed overview: Makita 18V 5Ah compatible battery - photo 2
This replacement battery BL1850B is designed for Makita 18V LXT cordless tools (BL1850, BL1860, BL1830, BL1840). Over time, the original battery loses capacity and runtime drops: replacing it gives your device a full day of use again.
With a capacity of 5.0 Ah, it matches the original battery's characteristics. Before ordering, be sure to check the exact reference of your battery (BL1850B) and the precise model of your device, as variants exist across series.
Tip: a spare battery charged in advance is also a handy safety net for outings, travel or long sessions, so you never run out at the wrong moment.
EAN: 0088381459129
Our tester's review: Yoni Marchal-Laporte
This compatible 18V 5Ah battery targets Makita LXT tools at a price roughly 40% below the genuine item, and its mount fits normally across the whole range, with no reported jamming on a recent tool. On real capacity, a genuine Makita battery typically reaches 93% of its stated value, against around 64% for an honestly made compatible, a real gap worth knowing before buying. One point of caution on the listing itself: it mentions a CoolPack technology, yet CoolPack is a technology patented by Bosch, unrelated to this Makita-compatible battery, which weakens the credibility of the marketing copy. Under heavy sustained load (grinding), even an honest compatible in this category can heat up significantly, despite short-circuit protection that does work. For occasional use on a tight budget, it remains an option; for intensive professional use, the capacity and thermal gap against a genuine unit is worth knowing.
In-depth review Compatible Makita 18V 5.0Ah Battery: Our Full Review 3.0/5 Read our full review → Actual delivered capacity 2.8 Compatibility and ecosystem breadth 3.8 Reliability and long-term endurance 2.6 Charge time and tool runtime 3.2 Build and interface 2.8 Compatibility and camera recognition not measured Reliability and cycle count not measured Cell build and safety not measuredFrequently asked questions: Makita 18V 5Ah compatible battery - photo 2
Yes, with 18V LXT tools, whose mount is shared across the entire range, from the rotary hammer to the site radio. Do not confuse it with the more compact 12V CXT range, which uses a different mounting. If your tool says 18V LXT on its label, this pack suits it.
In the vast majority of cases this is not a failure: the pack is outside its temperature range, too hot after sustained use or too cold in winter, and the charger waits rather than forcing it. Let it return to room temperature and charging starts on its own. If the flashing persists on a temperate pack with clean contacts, that points to a failing cell.
Need help choosing?
Other products in the "Portable electrical" category
Bosch 18V 5Ah compatible battery
See price (44)
Replacement battery for Bosch Professional 18V cordless tools (GBA, BAT618, BAT620, GSR, GSB, GBH). Restore your device's original runtime when the battery gets tired.
Bosch ProCORE18V 8.0Ah battery
See price (7)
The ProCORE18V 8.0Ah tops the Bosch Professional 18V range: 87% more power than a conventional battery, with CoolPack 2.0 heat management built in.
DeWalt XR 18V 5Ah (DCB184)
See price (21)
The genuine runtime for your DeWalt tools: the XR 18V 5Ah battery (DCB184) powers the whole XR cordless range with a charge indicator and full compatibility.
Dyson V8 Battery
See price (26)
Give your vacuum its breath back: this 21.6V replacement battery restores the runtime and suction power of your tired Dyson V8.
Published on 10/07/2026, updated on 30/07/2026