Fast-charging battery with no memory effect and very low self-discharge when stored. High performance, lightweight lithium-ion cells are capable of 500-1500 charge cycles. Long life blade contacts. Charging time 3-5 hours. Compatible with Silverline tools: DIY 18V Drill Driver (305706 / 326579), 18V Impact Driver (578256), 18V Combi Hammer Drill (768644) and DIY Combi Hammer Drill (946680 / 983743).