18V Makita 18V LXT · Slide-on pack
4.0Ah replacement battery cross-referenced to BL1840B
A 4.0Ah / 72Wh slide-on pack for the Makita 18V LXT interface, built for distributors and private-label brands — your branding on the housing, no third-party logos.
- Rated capacity
- 4.0Ah
- Rated energy
- 72Wh
- OEM reference
- BL1840B
- MOQ
- 500-1,000 pcs per SKU
Rung 2 of 4
Where the 4.0Ah sits in the range
The mid-range LXT pack. Double the runtime of the 3.0Ah in the extended housing, at a price that still positions below the 5.0Ah. This is usually where a private-label LXT programme starts, because it is the capacity a buyer compares on price without expecting the top specification.
At 72Wh this pack stays under the 100Wh threshold, which keeps air freight and passenger-baggage rules straightforward — the simplest capacity band to ship and to sell into retail channels.
Technical overview
Product specification
Cell grade, fuel-gauge behaviour and protection thresholds are confirmed per programme during sampling — the values below are the platform baseline.
Full Makita 18V LXT series| Product type | Lithium-ion replacement power tool battery pack |
|---|---|
| Compatible platform | Makita 18V LXT |
| Voltage | 18V |
| Rated capacity | 4.0Ah |
| Rated energy | 72Wh |
| Compatible reference | BL1840B |
| Form factor | Slide-on pack |
| Continuous discharge | 15C continuous |
| MOQ | 500-1,000 pcs per SKU |
Engineering
How this pack is built
- 01
LXT slide-on geometry and latch engagement validated at +/-0.1 mm terminal tolerances.
- 02
CE / RoHS documentation paths for EU export programs alongside UL 2595 for North America.
- 03
BMS balancing and over-temperature protection calibrated for compact high-Ah variants.
- 04
Sample prototypes ready in 5-10 working days after requirements sign-off.
Every capacity in this series ships under your own label — artwork, housing colour, packaging and pack configuration are specified per programme.
Private-label optionsSame series
Other capacity options
Need pricing, samples or custom packaging?
Send expected quantity, target market and branding requirements for the 4.0Ah (BL1840B). Engineering reply within 1 business day.