Nickel-Cadmium</br>Long lasting</br>Dremel 750 owners?? please call Dremel customer service on 1-800-437-3635 to check if this battery fits your product</br></br>Product Description</br></br><li>Dremel 3 hour Rechargeable Battery <li>Use with #750 Rotary Cordless Tool <li>Nickel-Cadmium</br><br/>http://www.amazon.com/gp/product/B0000302YF