Ryobi Battery Adapters
Ryobi ONE+ is the platform most likely to be somebody’s first, and Ryobi has kept the same battery fitting for well over a decade — an old battery still fits a new tool. 39 adapters here.
That longevity cuts both ways: plenty of people have a pile of Ryobi ONE+ batteries and one tool on another platform. That is the pairing most of these solve.
Pick a tool to run from your Ryobi 18V ONE+ battery
Ryobi 18V ONE+ questions
Why do some batteries say 18V and others 20V?
They are the same class of battery, measured at two different moments. Five lithium cells in series read about 20V fresh off the charger with nothing drawing from them, and settle to about 18V once a tool is running. A brand that prints 20V is quoting the first figure and one that prints 18V is quoting the second. That is why an adapter between an "18V" platform and a "20V" platform works: there is no conversion to do.
Will this fit my other Ryobi batteries?
Only Ryobi 18V ONE+ batteries. Ryobi also sells Ryobi 36V/40V, and those use a different socket — same brand, different rail and terminals, so they need their own adapter. Compare the sliding rail on your battery against the photos before ordering.
How do I find the right adapter on this page?
Use the selector at the top: pick the platform on the other side of the pair and it takes you straight to the one adapter that joins them. Every combination in that list is one we actually make, so if it is there, it exists.
Can I go the other way round — run Ryobi 18V ONE+ tools from another brand’s battery?
Yes. Use the swap button next to the selector above and the page turns the search around, from Ryobi 18V ONE+ tools back to the batteries that can run them.
Can I charge a Ryobi 18V ONE+ battery through the adapter?
No. The adapter carries current from the battery to the tool and does nothing else — there is no charging circuit inside it. Keep charging Ryobi 18V ONE+ batteries on their usual Ryobi charger.
Will an adapter damage my Ryobi 18V ONE+ battery or my tool?
Used with undamaged, compatible equipment it is not expected to. Ryobi 18V ONE+ batteries are lithium-ion with their own protection circuit built into the battery, and it keeps doing its job through the adapter. Stop when the tool noticeably slows rather than running the battery flat, and stop using the adapter if it becomes unusually hot or the contacts look damaged.
Does it work with third-party Ryobi batteries?
Usually. What matters is the socket, not the badge: if the battery slides onto a Ryobi 18V ONE+ tool and locks the way an original does, the adapter will take it. Aftermarket batteries do vary in moulding, so if yours looks unusual send us a photo and we will check before you order.