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: 2-Pack Replacement 755-01 4.8V Battery for Rotary Tool Battery (1500mAh, NiMH) - Compatible with 7300, 7300 PT, 7300 N 8, 755-01, Dremel 750-02 : Tools & Home Improvement
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