The MiLi Power Spring is an essential accessory for the iPhone 4 especially if you frequently use 3G for browsing, social media, and other energy hungry applications (like games). This is also a must-have for those who travel a lot because most of the time you’ll have problems finding outlets to charge your phone.
In terms of design the Power Spring is not a huge and ugly battery pack. It’s actually very stylish and the iPhone 4 fits perfectly in it. It might look a little bulky but it’s understandable considering this thing actually charges your phone. When you use the Power Spring at 20%, you can get up to 85%-90% charge before the Power Spring’s juice runs out.
SRP for the MiLi Power Spring (iPhone 4) is P3,200. It’s available in most of the known Apple resellers like A Shop and iStudio.