This is a brand new Milwaukee M18 HB5.5 M18 5.5Ah REDLITHIUM-ION high output battery. The battery technology used for this product is Lithium-Ion (Li-Ion) with a battery capacity of 5 Ah and voltage of 18 V. It has a height of 8.9cm, length of 13.8cm, width of 11.2cm, and a weight of 1090g. The colour of the battery is black. This product is perfect for DIY tools and workshop equipment, specifically for power tool and air tool accessories.