Edge battery 4.0 Ah Tabless Lithium+ 18V ONE+. This battery is suitable for all Ryobi 18V ONE+ system tools. Innovative, 21700 cordless battery cells maximise the energy transfer path from battery to tool or when charging from charger to battery. Combined with Ryobi Intellicell™ technology, the battery provides up to 50% more run time. Intellicell technology monitors and balances individual cells to maximise run time, storage life and safety, and improve tool performance. In addition, the COOL-CORE PRO™ thermal management system keeps the battery running up to 25% cooler, extends battery life by 50% and ensures consistent power in all conditions. A power meter displays the battery charge and allows the user to monitor battery power consumption while working.