subtel® Battery Replacement for Dremel Multipro 7700-01, 7700-02 757-01 Cordless Power Tools - 7.2V NiMH 2Ah: Amazon.co.uk: DIY & Tools
7.2V 3000mAh Ni-MH Battery For Dremel 757-01 7700-01 7700-02 Not For 757 770 | eBay
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
EXTENSILO Battery Replacement for Dremel 757-01, 855-02, 855-45 for Electric Power Tools (2500 mAh, Li-ion, 10.8 V)