I have one of these
http://www.ebay.com/itm/4500mAh-Ext...Cell_Phone_PDA_Cases&var=&hash=item1c38ac1acc
not the price I paid. The vendor on ebay removed hes or hers account all the sudden.
My device does not work and I contacted support and got my money back. ****ing prick..the vendor also promised to send a new unit but no parcel ever arrived.
To get mine to power up I need to plug in the power cable, have the phone in the case and then push the on/off button. Remove the cable and now it stays on for a while.
Yes mine does also turn it self off now and then and I need to push the button again....
To get rid of the dock mode when the charging case is turned on I just install a module with xposed framework that disables docking mode.
The issue I have is that the case does not register my device. If I push the button without having the cable connected it just flashes the lights a few times and turns off again. It acts like it doesn't have any device in the case..
I want to find a slim case with a PHYSICAL on and off switch. Not a micro switch that sends a 11 or 10101 signal to some motherboard inside the case and enables the charging. This solution is crap!
...theres no way im buying that sony battery case for that price and that tiny little battery inside