Black & Decker LBXR36 40-Volt Lithium Ion Battery, 1-1/2 Ah
Black & Decker’s Lithium Ion batteries will a charge for up to 500 days between uses, but will need to be recharged before use after that time.  These batteries have been formulated for longer runtime and improved performance. They are 25 lighter then NiCad batteries and 34-percent smaller. The LBXR36 40 Volt Extended -percent Run Time lithium battery is compatible with the 40-Volt line of outdoor power equipment which includes string trimmer (LST136), hedge trimmer (LHT2436), sweeper vac (LSW36) and other power equipment.