0859-0020 hawker energy cyclon 12v 8ah (fits ryobi 150r)Hawker cells use a sealed construction providing long service life, rugged construction, extreme temperature performance, fast recharge, high discharge rates and low internal resistance. Can be added together to get higher voltages and capacities. High rate charge and discharge capable Extreme temperature performance ( 65C to +80C) Pure lead tin construction low internal resistance Long cycle life up to 1500 charge recharge cycles Rapid charge capable