- Lithium Ion 16340 cylindrical rechargeable batteries<br />- Lighting or other device needing 3.7V power<br />- Product print '880mAh'、 the exact capacity is 550mAh<br />                                                                                                                                Dimensions: 1.38 in x 0.63 in x 0.63 in<br />Weight: 1.31 oz