Makita BL1021B 12V MAX CXT Lithium-Ion 2.0Ah

Overview

The Makita BL1021B is a 12V max CXT 2.0Ah lithium‑ion battery designed for compact power and all‑day comfort. It keeps sub‑compact tools nimble for precise drilling and fastening, and includes an onboard LED fuel gauge for quick charge checks.

Use This If / Avoid This If

• Use if: You prioritize low weight for overhead work, service calls, cabinetry, electrical trim, or small fasteners.
• Avoid if: You need long, continuous runtime or plan to use high‑draw tools (e.g., circular saw, extended drilling). Consider the BL1041B 4.0Ah or moving to Makita 18V LXT for heavier tasks.

Runtime and Charging

Energy: ~21.6 Wh (10.8V nominal × 2.0Ah). Real‑world runtimes vary by tool and load, but here are conservative ranges:

• Light fastening: ~50–150 #8 wood screws (1–1/4" to 1–1/2") into SPF with a 12V driver.
• Intermittent drilling: ~15–30 minutes of mixed 1/8–1/4 in bit work in softwood/light metal.

Charger	Typical charge time	Notes
Rapid CXT (e.g., DC10SB)	~30–50 minutes	Fast turnaround between tasks
Standard CXT (e.g., DC10WD)	~50–70 minutes	Charge times depend on temperature and battery condition

Tip: Keep a second pack ready to swap for near‑continuous work.

Compatibility

• Fits all Makita 12V max CXT slide‑style tools and CXT chargers.
• Not compatible with Makita 18V LXT or 40V max XGT tools/chargers.
• Does not fit older stick/pod‑style 10.8V tools.

Pros and Considerations

• Pros: Very lightweight, balanced handling, integrated fuel gauge, quick recharge with rapid charger.
• Considerations: Shorter runtime than 4.0Ah; best for light to moderate tasks.

Alternatives

• Makita BL1041B (4.0Ah): About 2× runtime with a modest weight increase—ideal for extended fastening or drilling.
• Makita 18V LXT platform: Choose for high‑demand tools and all‑day runtime at the cost of extra weight.

Care, Storage, and Safety

• Charge and store in a cool, dry place (best around 50–86°F / 10–30°C). Avoid heat above 104°F (40°C).
• If the pack is hot or very cold after use, let it reach room temperature before charging.
• For storage over 30 days, leave ~40–80% charge and top up every few months.
• Use only genuine Makita CXT chargers. Do not use damaged packs; recycle per local rules.

FAQs

How long does it take to charge?

About 30–70 minutes depending on the charger model and temperature. Rapid chargers are faster than standard chargers.

Does it have a fuel gauge?

Yes. A built‑in LED indicator shows remaining charge to help plan swaps.

Can I mix 2.0Ah and 4.0Ah batteries on the same tool?

Yes. Runtime and balance will change, but the tool will operate normally with either capacity.

Is this the same as Makita 10.8V?

Makita 12V max CXT is the slide‑style platform (nominal 10.8V). If your tool is slide‑style CXT, this pack will fit.