DeWalt XR 18V replacement batteries

About this battery system

DeWalt 18V XR powers a large family of cordless trade tools. Traditional XR lithium-ion slide packs are joined by POWERSTACK designs; DeWalt's FLEXVOLT packs can also supply compatible 18V XR tools.

POWERSTACK and conventional XR pack constructions differ. Confirm the exact SKU and intended application.

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

Battery chemistry, cells and energy

The manufacturer lists both standard XR Li-ion and POWERSTACK designs; don't infer identical internal cells across the range.

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.