... is below 2.9V start protection, turn off the output, you can perfect or protect the lithium polymer battery 18650! ! Can ... activate the button repeatedly or press long time Do not put anti-battery, that will burn out the circuit board.Package ... :NOKIA,HTC,varied USB charge devicesNOT Supported:iphone,iPADI f you need to charge iphone,cutting off the 2 usb signal ...