I have also been using a Manual battery charger for years but why the router speed control ?? does that control the heat if you are cutting smaller cores ?? for any smaller work i have done up to this point is using an old model train transformer . always wanted to try a regular rc battery with s speed control and a servo tester to control the heat .
Yes the router speed control will let you turn down the current. That way you can fine tune how hot the wire gets. I like this system best of all the ways I've tired.
