Compatible with Models: SDT54-16718 Battery kind: Li-Polymer, Voltage: 3.7V, Capacity: 190mAh / 0.70Wh. Size: 25.90 x 20.50 x 5.30mm, Weight: 30.0g. No memory effect, over-charge, over-discharge, over-heat, over-current and short-circuit protection. Our products have passed strict quality inspection. if you have any questions, you can contact us. 365 days warranty