If I would only get 30 mins or so out of the 9 volt battery are there any longer life battery alternatives that would still be feasible to carry around attached to a small 3 inch x 2 inch project box?
If I would only get 30 mins or so out of the 9 volt battery are there any longer life battery alternatives that would still be feasible to carry around attached to a small 3 inch x 2 inch project box?