Einhell Power X-Change 18V replacement batteries

About this battery system

Einhell Power X-Change is an 18V shared battery platform across DIY, workshop and garden equipment. Certain 36V Twin-Pack tools take two compatible 18V batteries rather than a separate 36V pack.

For Twin-Pack tools, check whether both packs must have matching capacity and charge state according to the tool manual.

Manufacturer-supported example specifications below; individual tool fitments and Amazon availability still require checking.

Battery chemistry, cells and energy

Einhell explicitly identifies 21700 Li-ion cells in its PXC+ 18V 4.0Ah (item 4511553); this does not establish the cells used in all PXC packs.

Energy (Wh) = nominal voltage (V) × capacity (Ah). Divide by 1,000 for kWh. These are nominal estimates, not measured usable energy or guaranteed runtime. A 90Wh pack is 0.09kWh; at an illustrative constant 90W load, ideal runtime would be one hour before losses. Real power tools draw variable power.

Technical reference: Manufacturer documentation ↗. Manufacturer specifications are not Amazon price or stock verification.

Choosing a replacement battery

Platform family is an initial research grouping, not a verified fitment for every tool or generation. Check exact tool model, battery part number, connector and charger compatibility. Do not assume matching voltage means interchangeable.