SujithZis said:
ramuna , those are too big , i need something a like a mint booster something few centimetres long ,
Well, the qi magicdisk wireless charger is normally powered using the USB port of a computer, so I'm guessing that you want to supply power to the charger independently from a computer. Assume that you obtain your ideal "few centimetres long" booster, if you add in the size of the required batteries to power the boost converter, will this total size be less than or greater than the plug-in power supplies I mention in post #6 ? Also, will these be single use batteries or rechargeable ? If the former, then the solution would be expensive, if the latter then all you are doing is to introduce an unnecessary and expensive additional step in the process of transferring power from the mains to the device (cell phone ?) being charged, in comparison with the solution proposed in post #6.