I have a SP2Pro, but pretty sure if I upgrade to the SP4 when it comes out, it'll have the connected standby enabled. Just how much battery drain is this on a SP3? I read this varies alot for people, some saying that 100% full battery, it'll drain the battery to 50% with no SP3 use for 24hrs? Also, is it still true there is still no High Performace mode? If there is, will it actually have a major performance/battery life hit on the SP3? Example: IF I had the high performance power mode on, but not doing anything but webbrowsing, Office stuff, no gaming, how bad will that drain the battery?