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Ryobi USB Lithium (4V) Battery Compatibility Guide/

Ryobi USB Lithium (4V) Battery Compatibility Guide

Updated: June 15, 2026 | Garage Almanac

The Short Answer

All USB Lithium batteries fit all USB Lithium tools.

Platform	Ryobi USB Lithium (4V)
Nominal voltage	4V (other)
Cell format	1x 21700 / 18650
Introduced	2021
Charges with	USB-C / USB-A (on-board charging)
Official info	Ryobi batteries & chargers

The Ryobi USB Lithium (4V) is a other platform introduced in 2021, built around a 1x 21700 / 18650 cell pack. All USB Lithium batteries fit all USB Lithium tools.

Worth knowing: Separate compact platform; unrelated to ONE+ 18V.

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