The Makita BL1041B 12V max CXT Lithium-Ion 4.0Ah Battery is a slide-style power tool battery for Makita's 12V max CXT cordless platform. This is a power tool battery designed for powering Makita 12V max CXT cordless tools with longer runtime in a compact format. Model Number: BL1041B. If you already run Makita compact drills, impact drivers, or other CXT tools, this pack gives you more capacity without moving up to a larger tool platform.

The big selling point here is simple: 4.0Ah capacity on a compact 12V battery. That matters for users who like the size and handling of Makita's smaller cordless tools but need more time between charges. On service work, punch-list tasks, installation work, and everyday drilling or fastening, a higher-capacity battery means fewer swaps and less downtime.

Makita also built this pack with an integrated LED battery charge level indicator. That is one of those features you miss when it is not there. A quick button press tells you what kind of charge you have left before climbing a ladder, heading into a crawlspace, or starting the next task. It is a small detail, but it saves time and helps you plan battery rotation better on the job.

From a design standpoint, this is part of Makita's slide-style CXT battery system, which gives better balance and ergonomics than the older pod-style format. Makita's CXT line is built around compact cordless tools that are easier to carry and easier to use in tighter spots, and this battery supports that approach well. You get a battery that stays reasonably light at about 0.91 lbs while still delivering a noticeable bump in runtime.

Charging is straightforward, but compatibility matters. The BL1041B is made for the Makita 12V max CXT platform and is intended for use with Makita DC10WD and DC10SB chargers. Makita specifically states that it is not compatible with 12V max pod-style tools or chargers. That is the key thing buyers need to verify before ordering. If your tool uses the slide battery connection, you are in the right lane. If it uses the older pod-style battery, this is not the pack you want.

Makita lists a 130-minute charge time, so this battery is a good fit for users who rotate packs through the day or want a higher-capacity backup battery ready to go. It is also a solid choice if you are expanding a CXT kit and want longer runtime from the tools you already own instead of buying into another platform.

Who should buy it? This battery makes the most sense for current Makita 12V max CXT users who want more runtime from their compact cordless tools. It is a smart buy for techs, installers, electricians, maintenance crews, and serious DIY users who value smaller tool size but still want a battery that can keep up through longer tasks.

Makita BL1041B 12V max CXT Lithium-Ion 4.0Ah Battery for CXT Users Who Need More Time Per Charge

This is the battery you buy when your compact Makita CXT tools are the right size for the job, but the smaller packs are making too many trips to the charger.

• Who it's for: Makita 12V max CXT users who want longer runtime from compact drills, impact drivers, and other slide-style CXT tools.
• Why it stands out: The 4.0Ah capacity gives the compact CXT platform a more work-ready feel, and the built-in LED fuel gauge is a genuinely useful touch.
• Worth knowing: This is not for the older pod-style 12V Makita tools, and the charger is sold separately.

• What tools does this battery fit? It fits Makita 12V max CXT tools that use the slide-style battery connection.
• Does it work with Makita 12V pod-style tools? No. Makita states that the BL1041B is not compatible with 12V max pod-style tools or chargers.
• Which chargers work with this battery? Makita lists the DC10WD and DC10SB as compatible chargers.
• Does this battery have a charge indicator? Yes. It has an integrated LED battery charge level indicator.
• How long does it take to charge? Makita lists a charge time of 130 minutes.