Surface Pro 3 Dock with Surface Pro 4 - Power Issues

[Witch-King]

I'm currently running my SP4 with the SP3 dock and in general, I like the combination a great deal. I've used a lot of docks with various hardware and the SP3 dock is super easy to use. One thing I have noticed; however, is that the power supply that came with the dock is only a 45w power supply and the power supply that comes with the SP4 is a 65w power supply. This isn't typically a problem unless I'm doing something that really kicks up the fans on my SP4. When that happens, I noticed that my SP4 is in a constant state of charging with the charge percentage slowly declining over time.

For example, if I'm playing a game and I play for a few hours, I'll notice after a couple of hours that my battery is down to 80% even though my SP4 has been in the dock charging the entire time.

Does anyone know if it's possible to find a 65w power supply for the SP3 dock? It uses an AC adapter connection, so it isn't possible to use the 65W SP4 power supply with it.

 

[toaf]

Ive noticed that on my older SP2. sometimes the games I play take more juice than the charger can charge. I myself would just deal with it. I think plugging an over powered power supply into something is a bad idea.

 

[Witch-King]

Totally understood. Just wondering whether the SP3 Dock will handle a charge from the 65W charger and then whether there is some way to get it that charge since the connectors are so different.

 

[sharpuser]

Since charge-limiting circuitry is part of the dock, I would not recommend any modification.