Amazon.com : Shentec 2-Pack 3.5Ah 4.8V Dremel 5000755-01 Replacement Battery for Dremel 7300, Dremel 7300-PT, Dremel 7300-N/8, Dremel 755-01 Cordless Rotary Tool (Not Fit for Dremel 755,7500, 7400, 750) : Tools & Home Improvement
Dremel, 8200, 8220, 8300 replacement battery
Amazon.com: Powerextra 7300 Replacement Battery Compatible with Dremel 755-01 Battery 3000mAh 4.8V for 7300-N/8, 7300-PT Pet Nail Grooming Tool (May not fit for Dremel 7400, 7500, 755, 750) : Tools & Home Improvement
Amazon.com: Shentec Upgraded 4.8V 2.5Ah Dremel 5000755-01 Replacement Battery for Dremel 7300, Dremel 7300-PT, Dremel 7300-N/8, Dremel 755-01 Cordless Rotary Tool (Not fit for Dremel 750 Series) : Tools & Home Improvement