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
Amazon.com: Hanaix 7.2 Volt 3500mAh Battery Compatible with Dremel 7700-01 and Dremel 7700-02 Replacement Dremel 757-01 Dremel 7.2 Volt Battery (Do not fit Dremel 770 Type 1) : Tools & Home Improvement
Dremel 7700-1/15 7.2 V MultiPro Cordless Rotary Kit With 15 Accessories - Newegg.com
Amazon.com : Shentec 2-Pack 3.5Ah 7.2V High Capacity Replacement Battery Compatible with Dremel 757-01 Dremel 7700-01 Dremel 7700-02, Ni-MH(Not Fit for Dremel MultiPro 7700 Type 1, 770T2 and 73000 : Tools & Home Improvement