It's really small size, did you see a lithium polymer battery like this? 14mm wide and 17mm long? 95mAh 3.7v, amazing! | Polymer, Small, Lipo battery
Panasonic Commercializes the Industry's Smallest Pin Shaped Lithium Ion Battery | Innovations/Technologies | Company | Blog Posts | Panasonic Newsroom Global
Lithium Ion Battery - 110mAh - PRT-13853 - SparkFun Electronics