Most Ryobi batteries with the same voltage are interchangeable with chargers of their type. ... If you have another lithium-ion 18V battery charger from Ryobi, that one will work fine. It is important to note that you should not charge a lithium-ion battery on a nickel-cadmium charger.

Do all Ryobi batteries interchangeable?

The One+ batteries are 18v Lithium-Ion and include a "push in" style fitting that is completely interchangeable with the entire range of One+ tool's.

Can any Ryobi charger charge any Ryobi battery?

Yes, the lithium batteries will work just fine in any of the older (blue) 18 volt Ryobi products. You will have to buy a lithium battery charger though.