Cordless Tool Battery Packs

Match the pack voltage and connector type to your tool and brand, confirm chemistry (Li-ion is common), check amp-hour (Ah) for runtime needs, and ensure physical size and weight fit your tool or charger

Many third-party packs work if they match voltage, connector, and physical fit; however, compatibility varies and may affect tool performance or warranty, so verify specifications and seller compatibility information before buying

Voltage determines tool power and compatibility, while amp-hour (Ah) indicates capacity and runtime—higher Ah gives longer run time at the same voltage; total energy is roughly voltage multiplied by Ah

Store in a cool, dry place at partial charge (around 30–50%), avoid extreme temperatures, remove from the tool when not in use, and follow manufacturer charging and usage guidelines to reduce capacity loss over time

Look for built-in protections such as overcharge, overdischarge, overcurrent, short-circuit protection, and thermal management; certifications like UL or IEC testing indicate compliance with safety standards

Typical lithium-ion packs retain useful capacity for 2–5 years or a few hundred charge cycles depending on usage and care; replace when runtime drops significantly or performance/thermal issues appear

Chargers and batteries are generally not interchangeable across different voltages or series; always use a charger rated for the battery's voltage and chemistry to avoid damage or safety risks