@freegink 人家很清晰的写了:Dual 100mAh rechargeable lithium-ion polymer batteries, Full charge in less than 1.5 hours, 48 hours of normal use; advanced functionality like GPS use will impact battery performance.
A: Microsoft Band provides cross-platform functionality, and works with Windows Phone 8.1 update, iOS 7.1, 8 and Android 4.3-4.4 phones with Bluetooth.