EPower 20V Lithium Battery. The B 24 4Ah 20V STIGA E-Power Lithium-ion 'Smart' battery is interchangeable within the Stiga 100 and 300 range. What is really smart is that the battery ‘talks’ to the mower or tool it is fitted to ensuring that it provides the best performance and efficiency, regardless of whether you are cutting the grass or blowing leaves from the garden.
eBay