portable charger, bonai 20000mah power bank, 4-port output aluminum polymer portable battery charger, 4.0a max input compatible with iphone 11 xr 8 7 6s galaxy s20 s8 -rose gold bonai <b> bonai backup external battery charger - always support your life.</b> <br> <br> portable handheld size and high capacity: 20000mah polymer power bank more stable and more easy to take. <br> four usb port 4.8mah output, you can freely charge of your iphone ipad ipod samsung galaxy htc and more devices at the same time now. <br> <br> <b>intelligent safety protection - more safety </b><br>supports over-charged, over-discharged, over-voltage, over-current and short circuit protection. automatic shutdown if a short circuit or overload output occurred while unit is charging. <br> <br> <b>widely used </b><br> 1) you can use the micro cable input or your own the other cable input, use your original cable or a third-party certified cable one to output <br> 2) can charge most popular smart phones, such as: smart phones compatible with samsung, google, htc, huawei, nokia, lg etc <br> 3) can charge most popular tablet, such as. ipad, kindle, samsung tab, google nexus 7 and so on <br> <br> <b>warranty </b><br> all products from bonai provide 30 days money back and one year limited warranty.</br></br> <b>charge the power bank:</b></br> use the micro cable (2.0a) and your own cable (1.5a) usb port to connect with your own 5v/2a wall/car adapter. </br> one micro cable with 5v/2a adapter: 10~12 hours to full charge</br> one cable with 5v/2a adapter: 13~15 hours to full charge</br> one micro and iphone cable with 2*5v/2a adapter: 6~8 hours to full charge</br> four led indicators on means the power bank has been full charged, then the four led indicators will turn off in 10 seconds. </br></br> <b>"please charge and restart the power bank while it is under lock status or in shortcut protection by incorrect operation." </b></br> <b>lock status means that can’t turn on the power with any cable, then put it away for some days, then charge the power bank again to restart.</b>