<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 chargering cable input <br> 2) Can charge Most popular smart phones, such as: smart phones from 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>Charge the power bank:</b></br> Use the micro cable (2.0A) and your own chargering 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 the phone cable with 5V/2A adapter: 13~15 hours to full charge</br> One micro and one the other 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>