This 3.7V 200mAh (Lithium Polymer) Lipo Rechargeable battery is compact and thin. This battery has built-in overcharge protection. These batteries have higher specific energy than other types of lithium batteries and are utilised in situations where weight is an important factor. These Batteries are widely used in GPS devices, iPod, MP3 Player, FM, Bluetooth Speaker, IoT and other DIY and Industrial applications. Due to its compact size, it can fit anywhere.