I'm not sure if this is in the correct category but I wanted to share my thoughts and current dilema and see if I can get some feedback or recommendations.
I'm currently on the hunt for an external battery that will work for the surface pro 1. I've done some research and found a cord and purchased it after reading up on other blogs and forums.
Now I am looking for the battery itself. I'm looking for something that will give it about 4 more hours of battery life. I'm using the surface pro as my portable solution to digital drawing at conventions instead of having to bring my laptop and large pen display. I love the battery life it currently has, but adding 4 more hours or so will make it so I can cut costs on paying extra for electricity (on top of the fee for the table) at conventions and faires.
The requirements for the cable to work would be DC12V 3.6A. I'm sort of tech savvy when it comes to computer software but electrical and hardware are not my strongest points.
I've spent days looking for a battery but I also have a limited budget and can't afford to spend hundreds on a unit.
Here's a list of some batteries I found, would anyone be able to tell me if they would work? If not what would you recommend?
OXA Metal Box S1
NewNow Multifunction Power Bank
Anker 2nd Gen Astro Pro2
I would like know if anyone currently has a solution for their battery bank needs and would like to hear from you! Mind you I'm not very savvy with electrical modding so any simple solutions would be great to hear.