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 13-Piece 2-Speed Cordless 7.2-Volt Multipurpose Rotary Tool with Hard Case in the Rotary Tools department at Lowes.com
Amazon.com : Upgraded Powerextra 2 Pack 7.2 Volt 2000mah Battery Compatible with Dremel MultiPro Cordless Rotary Tool Models Dremel 7700-01 and Dremel 7700-02 Replacement Dremel 757-01 Dremel 7.2 volt Battery : Tools & Home Improvement
Amazon.com : Upgraded Powerextra 2 Pack 7.2 Volt 2000mah Battery Compatible with Dremel MultiPro Cordless Rotary Tool Models Dremel 7700-01 and Dremel 7700-02 Replacement Dremel 757-01 Dremel 7.2 volt Battery : Tools & Home Improvement
Hanaix 7.2 Volt 3500mAh Ni-MH Battery Compatible with Dremel 7700-01 and Dremel 7700-02 Replacement Dremel 757-01 (Do not fit Dremel 770 Type 1) : Tools & Home Improvement