I don't, but what does that have to do with this topic? Charging and discharging is a matter of the charger chip, not the SoC. The only thing somewhat relating to this topic is that those devices have quite big batteries as the x86 CPUs and big screens need that power to be operational for an acceptable time, therefore the battery has to have a high capacity and to be charged for a long time, especially on low-energy chargers like on cars, laptops or planes, which often just give you 0,5A.
Or maybe you're relating to the standby of those chips using more energy than what can be charged with these chargers? When I use it, even my smartphone (Galaxy Note 2) cannot be charged with less than 1A @5V as the discharge is too high, also it gets quite hot, so that's (kinda) normal...
Can you put a link somewhere so we know what you meant exactly?