Ryobi ONE+ 18V replacement batteries

About this battery system

Ryobi ONE+ is a broad DIY and garden platform using the same 18V battery family across many tools. Smaller packs suit screwdrivers and drills; larger High Energy and EDGE packs are aimed at demanding saws, mowers and other high-load equipment.

ONE+ 18V is separate from Ryobi 36V MAX POWER. Do not mix the two systems.

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

Battery chemistry, cells and energy

Lithium-ion cells are used, but individual cell format and count vary by battery model and are not verified here.

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.

Amazon UK · Direct product listing

Ryobi RB18L50 18V 5.0Ah battery

Ryobi ONE+ lithium-ion replacement battery. Nominal energy: 18V × 5.0Ah = 90Wh (0.090kWh). This is a calculated nominal capacity, not a measured runtime or live Amazon product specification.

Ryobi RB18L50 · 5.0Ah

Generic illustration · exact Amazon product image not supplied by this link

ASIN B0117BTDT4, supplied via Amazon Associates SiteStripe. Price, stock and image are not retrieved automatically. Check the listing before ordering.

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.