YI-YI USB Battery Charger + 3.8V 4500mAh Battery + EU Plug Adapter for Samsung Galaxy S5 - Black
With 0.8" LCD screen on the charger; Battery capacity can be tested and shown on the screen; Battery charger: input: AC 100~240V 50/60Hz 150mA; output: DC 4.2V 400+/-50mA; USB: DC 5.2V 1250mA; Rechargeable battery width: 3.2~5.5cm