CONVENIENCE :Battery charge level with 4 bright green L.E.D. indicators to clearly see charge level) EFFICIENCY :Reaches full charge in 28 minutes or less) DURABILITY :XGT@ batteries feature advanced design impact-resistant outer case and shock-absorbing inner-liner) TECHNOLOGY :Digital communication within XGT@ actively protects against overload, over-discharge and overheating) INCLUDES :40V max XGT@ 2.5Ah Battery)