You might think im crazy but I just did this and it works so far anyway, I cut open my charger for my dremel 7300 model ,my green charging light stop working aswell , I felt naked without my dremel, so after the fourth day I cut it open and tinkered with it, I unwrapped some of that blue tape that\'s covering the copper spool , forgive my terms I don\'t know the correct name anyway I found a lil clear device connecting two silver wires, I twisted them together by grabbing the clear thing and twist until wires are connected put back together , put a batt in and green light came on and is charging, my charger looks like frankenstien but it works, how long will it last NO IDEA but if it stops ill post it, if you try this I hope it works, I should have videoed myself maybe nextime