Battery Type: Lithium-Ion; Battery Voltage: 3.7V; Battery Capacity: 1150mAh. Intelligent: Kastar Mini Rapid A/C Charger Features a Fold-out US Plug, 100-240V Worldwide Input Voltage, with high speed USB charge function. LCD Display: LCD Screen Indicator (25%,50%,75%,100%) lets you know that your battery charging status, when LCD Screen Indicator show 100% mean battery is full. Multi Protection: Built-in protection circuit prevents overcharging and heats. Much Inconvience: The charger charges not only for your battery, also for almost all the smartphone and batteries.