Powerextra 7.2 Volt 2000mAh Battery Compatible with Dremel MultiPro Cordless Rotary Tool Models Dremel 7700-01 and Dremel 7700-02 Replace for Dremel 757-01(Do not fit Dremel 770 Type 1, 770T2, 7300) - Amazon.com
DREMEL 7700-1/15 100037839 | Home Hardware Center
Dremel 7.2-Volt Multipro NiCad Battery for Rotary Tools 757-01 - The Home Depot