I have several M18 power supplies and needed to use them with my Makita grinder. This worked great and saved me from having to buy a different battery profile or ecosystem. I have to warn you, when using these adapters it's best to identify the battery by the adapter if you're not going to be using it for a long period of time as parasitic drafts can occur, at least on the other one I have and the one I have not been able to restore a very used battery that I mistakenly left on for an extended period of time, so I unplug almost all my batteries when not in use. does what it says It improves the use of the tool when stuck, but it's not that big of a deal compared to another charger and battery that needs to be controlled. helps consolidate how many batteries works the same way. I was able to convert an old Dewalt XRP drill bit from NiCd to Lithium using a different adapter, which made me a firm believer in these adapters. When working with powerful power tools, you still need a secure fit and good connections, but they are firmly attached to the tool and battery. Would definitely buy more of these.
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