Makita Launches High-Capacity BL1890B & BL18120B Batteries 2025

Makita has officially expanded its legendary 18V LXT battery lineup with the release of two powerhouse additions: the BL1890B (9.0Ah) and the BL18120B (12.0Ah). Designed to deliver maximum runtime for today’s demanding cordless tools, these batteries bring fresh capability to contractors, tradespeople, and serious DIYers who rely on the LXT system daily.

See the availability on Amazon: Makita BL18120B

Cordless tools live and die by their battery packs, and Makita has recognized the need for larger “fuel tanks.” The BL1890B and BL18120B address that demand, offering longer runtime, stronger performance under load, and fewer battery swaps on the jobsite.

Related: Makita XSS02Z Review 2025

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Makita BL1890B: A 9.0Ah Power Upgrade

The BL1890B enters the lineup as a 9.0Ah high-capacity pack, giving users nearly double the runtime of a standard 5.0Ah battery while maintaining compatibility with most 18V LXT ecosystem. (There are limitations due to it’s size)

Key highlights:

• Capacity: ~9.0Ah
• Energy Storage: Approx. 162Wh
• Compatibility: 100% with all 18V LXT tools and chargers
• Protections: Built-in safeguards against over-discharge, overload, and overheating

For trades that need extended performance without the full bulk of a 12.0Ah pack, the BL1890B provides the perfect balance. It’s ideal for remodelers, carpenters, and installers who want more runtime but still need to keep their tools manageable in weight.

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Makita BL18120B: The 12.0Ah Heavy Hitter

The headline release is without doubt the Makita BL18120B — a massive 12.0Ah (216Wh) battery pack that now sits at the top of the LXT lineup. It effectively doubles the runtime of a 6.0Ah battery, delivering maximum output for the most demanding tools.

Notable features:

• Capacity: 12.0Ah (216Wh total energy)
• Runtime: Up to 2x that of a 6.0Ah pack
• Charge Indicator: 4-LED display for instant fuel checks
• Durability: Makita’s Optimum Charging System ensures balanced cells and controlled heat management
• Weight: ~1.3kg, designed for tools where runtime matters more than portability

The BL18120B is targeted at professionals using grinders, circular saws, and rotary hammers — tools that demand serious energy for continuous operation. While heavier than standard packs, the payoff is significantly reduced downtime on long jobs.

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Benefits of the New Batteries

✅ Longer Runtime

Both packs offer significantly more runtime compared to 5.0Ah and 6.0Ah batteries, reducing the need to carry multiple spares.

✅ Stronger Performance Under Load

Higher capacity means less voltage sag, allowing tools to run closer to full power for longer.

✅ LXT Compatibility

These packs slot into more than 300 Makita 18V LXT tools, maintaining compatibility to most of the tools. (There are limitations due to battery size)

✅ Smart Protection

Built-in electronics protect against overheating, over-discharge, and overloading — extending both tool and battery life.

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Things to Consider

While these new batteries deliver huge benefits, buyers should be aware of the trade-offs:

• Weight: The BL18120B especially adds noticeable heft. On smaller tools, this can impact ergonomics.
• Charging Time: Larger packs require more charging time, so investing in a high-speed Makita charger is recommended.
• Cost: Expect to pay a premium for top-tier capacity, especially with the 12.0Ah pack.

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Who Should Upgrade?

• BL1890B (9.0Ah): Best for those who want extended runtime but don’t want the weight of a 12Ah pack. Great for contractors switching between multiple tools.
• BL18120B (12.0Ah): Ideal for professionals running high-draw tools all day long, where reduced downtime outweighs added weight.

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Final Thoughts: A Strong Step Forward for LXT

With the launch of the BL1890B and BL18120B, Makita has cemented its commitment to the LXT platform, ensuring that professionals and hobbyists alike can push their tools further than ever before. These packs represent more than just bigger batteries — they’re a direct answer to the growing demand for cordless solutions that can compete with corded tools in runtime and reliability.

If you’re already invested in Makita’s 18V LXT ecosystem, these new releases are worth serious consideration. Whether you want the balance of the BL1890B or the endurance of the BL18120B, both will elevate the cordless experience in 2025 and beyond.

Best wishes,

Alexander.