China Laptop Power Bank Features Portable laptop power bank with 31800mAh big capacity, small size L5.51鈥?W6.29鈥?T0.9鈥?/p High Compatibility: compatible with Lenovo, Thinkpad, Dell, Acer, Macbook, Surface, Game machine, mobile phones, Pad, projector etc 6pcs Boston batteries built in, 3000 cycles of long life With QC3.0 fast charge, 27% quicker than QC2.0 Make you work play anywhere anytime Specification Size: L140*W160*T23mm Battery Capacity: 31800mAh/117.6Wh, Boston battery Housing Material: Metal + ABS Housing TYPE-C: 5V,9V,12V/2.4A, IN(DC):7v-20v/4A OUT(DC): 9V/3A,12V,16V/5.5A,20V/4.5A OUT1:5V12V/2.4A, OUT2:5V/2.5A Display: Digital LCD display Weight: 720g Packing list 10pcs/Master Carton Master Carton Size:41cm*38cm*14.1cm G.W: 11.5kg FAQ How many times can this portable laptop Power Bank charge Macbook? It can charge Macbook twice. Do I need to buy laptop connectors separately? There are 10pcs different type connectors in accessories for main trend laptops.China Laptop Power Bank website:http://www.kingwaretech.com/power-bank/laptop-power-bank/