The RYOBI 40V Integrated Rapid Charger is compatible with RYOBI 40V on-board charging tools. This Integrated Charger, charges one battery at a time when plugged into a RYOBI 40V on-board charging tool, like the 40V Backpack Power Supply (OP40BPAVNM). The 6A charge rate provides 4X faster charging, compared to RYOBI's 40-Volt Charger w/USB (OP403A), charging a 4Ah battery in 40-minutes. It has a 6 ft. cord for convenience and the LED indicator shows the status of each battery while it's charged and maintained. Spend less time charging batteries and more time getting yard work done. Backed by a 3-year limited warranty.