If you have a large yard or need extra run time, the RYOBI 40-Volt 4.0 Ah high capacity battery is the perfect addition to your RYOBI 40-Volt collection. This 4.0 Ah battery lasts 2X longer than the standard RYOBI 40-Volt high capacity battery while delivering the same fade-free power and performance. All RYOBI 40-Volt batteries come with an on-board battery life indicator for user convenience and over-molded edges for impact protection. This battery works with all RYOBI 40-Volt tools and chargers. Charge your 40-Volt lithium-Ion batteries with this charger from RYOBI. Compatible with all RYOBI 40-Volt batteries, this charger is equipped with a USB power source to charge your small electronics while plugged in. This compact charger and can be mounted on your wall for easy storage and accessibility. Featuring innovative charging technology, it is equipped to protect and extend the life of the battery.