12VDC to 18VDC Hard wire tools through the charger
I am working off grid and I want to run 18V tools directly off my deep cycles I have powered by solar. I have a few dead ryobi one batt. laying around that I could open up to use. My question is can I use a 12V DC charger for the 18v batts to power an 18v grinder? I would gut the batteries and wire the two together put one in the charger one in the grinder. Too much amperage for the charger?