External USB battery : Anker 2nd Gen Astro 3 no working with Surface 3 Home › Surface Accessories › External USB battery : Anker 2nd Gen Astro 3 no working with Surface 3 This topic contains 4 replies, has 2 voices, and was last updated by tim 1 year, 9 months ago. Author Posts November 20, 2015 at 11:26 am #1280 chris sacceParticipant Hi, I bought this externalUSB battery from Amazon : Anker Astro 3 and this is not charging the Surface 3 at all (not charging). I also experienced this with a power adpater Aukey PA-U28Aukey PA-U28 which also fails charging. I don’t know if this comes from the Surface itself, but MS seems to make it impossible to charge the S3 with 3rd party power supplies. Any experience on this ? November 21, 2015 at 9:40 am #1301 timKeymaster MikeGuyver makes batteries for the SP3/4 and Surface Book… http://www.mikegyver.com/ November 22, 2015 at 12:46 pm #1327 chris sacceParticipant thnats for the link. These are expensive batteries though. Anker has a medium range price, unfortunately it doesn’t seem to work with S3. November 28, 2015 at 6:28 pm #1394 chris sacceParticipant UPDATE : In fact it does work if you are using the MS genuine USB cable with the battery. I previously used another longer USB cable that actually works with the power adapter. November 29, 2015 at 11:59 am #1400 timKeymaster Thanks for the follow-up Chris. that’s good information to have. Author Posts You must be logged in to reply to this topic.