What should I look for when choosing power tool batteries and chargers?

When choosing power tool batteries and chargers, match the voltage to your existing tools, check the amp-hour (Ah) rating for runtime and look for features like charge-status indicators, fast-charging capability, overcharge protection and compatibility with multiple tools in the same battery platform.

What’s the difference between 2-Ah and 4-Ah power tool batteries?

The main difference between 2-Ah and 4-Ah power tool batteries is runtime. A 4-Ah battery generally runs about twice as long as a 2-Ah battery at the same voltage, but it’s usually heavier and may take longer to recharge. Choose higher Ah ratings for extended use like cutting, drilling or grinding.

Can I use any charger with my cordless power tool battery?

You shouldn’t use just any charger with a cordless power tool battery. Always match the charger to the battery system’s voltage and chemistry, and use a charger designed for that specific battery platform to ensure it has the correct charging rate.

How can I make power tool batteries last longer between replacements?

To make power tool batteries last longer, avoid fully draining them, store them in a cool and dry place, keep the contact points clean, use the correct charger, and let hot batteries cool before charging. For lithium-ion batteries, partial charges are fine, and long-term storage is best at around 40% to 60% charge.