20v 3.25a 65w usb ac laptop charger for ideapad g50 g50-45 g50-80 g70-35 g70-70 g70-80 z40-70 z50-75 z70-80; thinkpad t430 t440 t440s t440p t450 t460 t460s t540p t560 e440 e450 e550 e560 wenyaa