How do you iPhone with inbuild charger on the case trully works?

[laumartins]

Hi Members,

There are so many companies these days claim to have cases with in-built chargers. How true is this?Any one with experience on any idea?I am looking to buy one with the best service.

Thanks

[scorpluto]

Have heard that Mophie Juice Pack plus is good. But it is expensive .

[xthebigsterx]

i dont have one but some friends do, its necesary only depending on the usage you do with your device and the time you cant charge it