Hi guys I purchased a MacBook Air 2014 13inch with 8gb ram i7 cpu 256gb ssd for £250 the MacBook is in very good condition like hardly any signs of being used etc... only issue is that the power button doesn’t work and the battery has been removed so when I plug it into charge it boots up but it is slow for some reason I am guessing as it has no battery. Now I want to buy a new battery but I was wondering if I purchase a external apple keyboard that has a power button will it switch it on?