Stackable External Battery Charger for your Smartphone
With STACK, you no longer have to worry about your smartphone’s battery life! Charge up the STACK through your computer’s USB port or wall outlet (USB to outlet dock not included). Purchase another STACK battery pack on STACK it on top of the other for wireless charging. When needed, take one external battery for the day, charge your phone, and when you return home, grab the other external battery for extra battery for dinner! Simple as that!
There are 4 LED lights to show how much the external battery has charged. 1 LED Light=25% charged, 2 LED Lights=50%, 3 LED Lights 75%, and 4 LED Lights 100%!
Combining a high-density 2500 mAh battery with an Micro USB connector, STACK battery packs provide all the portable recharging power whenever & wherever.