The best repair approach is finding exact replacement components ... This is exactly what [Daniel Jose Viana] did when his 110 volt Dremel tool popped its TRIAC after he plugged it into a 220 ...
Dremel 770 Type 1 Battery Repair Replacement on sale, Powerextra 7.2 Volt 2000mAh Battery for Dremel MultiPro Cordless on sale, Dremel MultiPro Cordless Model 770 Type 1 Battery Pack Repair on sale, ...