About this battery system
Worx PowerShare is marketed as 20V max, a peak-voltage naming convention used for an 18V nominal lithium-ion class. The battery family is designed for compatible Worx tools, not generic 20V tools from other brands.
20V max does not mean compatibility with DeWalt, Craftsman or other 20V-labelled packs.
Manufacturer-supported example specifications below; individual tool fitments and Amazon availability still require checking.
Battery chemistry, cells and energy
Li-ion cell details vary by pack; a specific pack teardown or manufacturer datasheet is required to confirm 18650 versus 21700.
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.
Verified example pack part numbers and capacities are being researched for this system.
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.
Genuine manufacturer packs
Look for the manufacturer's exact part number, supported charger and capacity in Ah.
Search genuine packs on Amazon UK ↗Third-party compatible packs
Check model-specific compatibility, seller identity, independent safety evidence and warranty.
Search compatible packs on Amazon UK ↗Safety and fitment
Avoid modified adapters and unverified packs; confirm BMS, protection, charging requirements and product safety documentation. Never assume that matching voltage, similar colour or an advertised adapter makes two packs interchangeable. Stop using swollen, damaged or overheating packs.