Einhell 2x 18V 4,0Ah PXC battery TwinpackEinhell 2x 18V 4,0Ah PXC battery Twinpack The 2x 18V 4. 0 Ah PXC are rechargeable batteries which are designed for universal use in the entire PXC product family. A single rechargeable battery and a single charger for all tools saves significant costs of buying, and universal use also helps protect the environment and provides flexibility at the same time. TWIN PACK technology provides prolonged working time + more power with 2x 18V batteries (=36V).