I have a number of Ryobi One+ tools that have enough power and quality for me in most cases. They all share the same 18V battery form factor which means that I can invest in 2-3 batteries and use them for any tool, which is nice. However, for longer jobs I would like the option of plugging the tools into an electrical socket and run off of that, to not have to charge or change batteries all the time.
Understandably, companies make lots of money from their battery sales and aren't interested in providing such a solution themselves. I would also break the warranty if I did something like this. However, practically, this this possible?
There are 3D-printed products that act as an adapter from a regular 18V laptop transformer and lets us plug that cable into the empty battery socket of a power tool. These are quite expensive and some reports vary on how well they work compared to the actual batteries. Before buying them I would like advice on if I can build one myself, and what transformer specifications would be necessary.
None of my tools or batteries specify the number of watts they consume at maximum load. When fully charged my multimeter says they output 20V DC. There must be a limit in the batteries so the tool doesn't drain the entire battery instantly and burn up, but is it possible to calculate that somehow without jacking in the multimeter between the battery and the tool and putting it under load? I don't think it would be safe to attempt that. My idea is that if I ran the tool from a 100-120W 20V transformer, or whatever the power I would need, it would simply be a matter of properly connecting the positive and ground wires to the tool battery socket. The easiest way would likely be to sacrifice a battery by taking it apart, removing the battery cells and rewiring it from the transformer. Is this very foolish or not?
Thanks for any help. I have some wired tools that are more powerful, but would really like to use my Ryobi kit both ways when their power is enough.