BLACK+DECKER 20V MAX* POWERCONNECT™ 4Ah Battery

This battery runs my tools much longer than the standard ones. I can complete a whole project without recharging. It's a bit heavier, but the power is worth it. Great buy.

I bought this for my drill and it's night and day. I can drill dozens of holes without the battery dying. It's also 80% more powerful – you can feel it. Definitely worth the upgrade.

At the sale price, it's a steal. The battery performs well and holds a charge. It's a bit heavy, but that's expected with a larger capacity. I only wish it cost less at regular price.

I have several BLACK+DECKER tools and this battery works with all of them. It's powerful and lasts a long time. I love that I can swap it between tools easily. Highly recommended.

I expected more runtime compared to the 2Ah battery, but it's not double as advertised. Maybe my usage is heavy. It does provide more power, but the weight is noticeable. Overall, it's fine but not amazing.

My old battery finally died, and this one is a perfect replacement. It fits my drill perfectly and gives me plenty of power. I appreciate the longer runtime – I can now finish bigger jobs without stopping.

I use this with my chainsaw and it lasts a decent amount of time. It charges quickly and holds a charge well. The only reason I'm not giving it five stars is that it's a bit bulky on smaller tools.