Ryobi's ONE+ system consists of a range of 18 volt power tools and garden tools that can all be powered from a standard battery and charger system.
Ryobi's ONE+ range of batteries and chargers fit with any of the ONE+ 18V tools in the range, covering over 100 power tools and garden tools. The modern lithium powered versions have increased storage and a four stage fuel gauge handily displays remaining power at 100, 75, 50 and 25% so you know when it's time to recharge.
Batteries and chargers can either be brought separately, as and when required, or purchased in kits to save on cost.