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
3Ah 7.2V Battery/Charger For Dremel 757-01 7700-01 7700-02 Not For 770 Type1 757 | eBay
CREABEST 2Packs 7.2V 3.5Ah Ni-MH Battery for Dremel MultiPro Cordless Rotary Tool Models Dremel 7700-01 7700-02 757-01 with One Charger - Amazon.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