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 757-01 7.2V MultiPro Battery Pack - PSC - Pro Supply Center
Dremel 7.2-Volt Rechargeable Cordless Tool Battery at Lowes.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 2117078 7.2 Volt Battery Pack
Dremel MultiPro Cordless Model 770 Type 1 - Battery Pack Repair : 4 Steps (with Pictures) - Instructables