The Gardena System Battery P4A PBA 18V/72 is a powerful and reliable energy source thanks to its low-maintenance lithium-ion battery cells. It can be recharged quickly at any time without any memory effect. This larger 18 V battery with 4.0 Ah allows for longer running times. It is part of the Power for All Alliance, based on Bosch battery technology. It fits all 18V garden tools from Gardena in the Power For All Alliance and can also be used across various other products within the alliance throughout the home.