If you’re using Makita tools, chances are you rely on their Makita 18V battery platform. It’s one of the most popular out there, powering everything from drills and impact drivers to saws and even garden tools. But with so many options—like the BL1830 (3.0Ah), BL1840 (4.0Ah), and BL1850 (5.0Ah)—it can be tricky to decide which replacement battery is right for you.

The first thing to consider is capacity (Ah). A higher Ah rating means longer runtime, but also a bit more weight. For heavy-duty jobs, a 5.0Ah battery is worth it. For lighter, quick tasks, a 3.0Ah is easier to handle.

Another point is compatibility. Makita’s star-rated batteries (with a little star symbol) include built-in protection against overheating, overloading, and over-discharging. Always check your tool for the same symbol to ensure full compatibility.

Lastly, think about charging time. The Makita DC18RC charger can recharge most 18V batteries quickly, but smaller packs naturally charge faster.

If you’re investing in new batteries, stick with genuine Makita or well-reviewed replacements with proper safety features. It’s a small detail, but the right battery choice can save you time, frustration, and even money in the long run.