Ryobi OP4026A Lithium-Ion 2400mAh 40V rechargeable battery

40V High Capacity Lithium-Ion Battery The RYOBI 40V Lithium-ion High Capacity battery provides fade-free power and extended run time for all RYOBI 40V tools. Whether you are in need of a replacement battery, or a spare, this battery is ready to keep your RYOBI 40V tools working. Use with the RYOBI 40V Charger to get a full charge in only 90 minutes. Backed by a RYOBI 3 year warranty, keep your 40V tools going with the RYOBI 40V Li-ion battery.