Reddit reviews XIEMIN Portable Charging Charger Cable for Microsoft Surface Pro 3/Pro4 12 Inch Tablet (Pro 3/ Pro4 Charging Cable)

This is asked on this subreddit every now and again.


You'll want a portable pack that is designed for laptops, something with a voltage selector:
http://www.amazon.com/20000mAh-Multi-Voltage-Portable-External-Notebooks/dp/B00B45EOYS/ref=sr_1_4?ie=UTF8&qid=1419242142&sr=8-4&keywords=portable+laptop+charger


Then you'll want a charging cable like this one:
http://www.amazon.com/Portable-Charging-Charger-Microsoft-Surface/dp/B00O6UCGS4/ref=sr_1_1?ie=UTF8&qid=1419242224&sr=8-1&keywords=surface+pro+3+cable

On the latter link, you can see a reviewer use the cable with the Anker battery pack I linked, and he says it works.

I believe the original SP3 charger had a recall due to overheating or something so that's probably why they're out of stock everywhere.

Amazon has this.

I had a Goal Zero Sherpa 50 (the battery pack with the inverter attachment) given to me for my birthday last year. The inverter causes some power loss versus a straight power adapter from the laptop port, so I picked up a cheap import cord and paired it with a little adapter to fit the output on the Sherpa. It's great for backup power but I haven't had to put it through any serious tests yet.

I've also heard great things about the Anker battery pack, and there were reviews on the Amazon listing page for the larger ones from other Surface users who had paired their batteries with the adapter cable I picked up.

Just get one of these and rewire the adapter or have someone who knows how to do that to do it for you. Very simple fix really.

The $20 qi-infinity cable has an LED but the Xiemin is only $7.

Youll need a charger cable that lets you plug into a DC port. Microsoft sells them, or you can get a 3rd party one on amazon for cheaper. I'm using this one: http://www.amazon.com/gp/product/B00O6UCGS4/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1

For the portable battery pack, you will need one that supports 12V DC output. The cheaper battery packs do NOT have DC output, only USB output (which will not work with SP3). I'm currently using this one, but there are cheaper options if you look around http://www.amazon.com/gp/product/B00JQKUCHQ/ref=gno_cart_title_0?ie=UTF8&psc=1&smid=A3DNJ55ZGSMH7I

I use these and they rock:
http://www.amazon.com/gp/product/B00B45EOYS?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
http://www.amazon.com/gp/product/B00O6UCGS4?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00

I have this battery and it charges my SP4. Build quality is OK, some sharp edges at the bottom of the battery pack as it's not a unibody design. You'll need to buy a charging tip though. I picked up this tip and it works - the only quirk about this cable is that the charging light on the tip is always on.

http://www.amazon.com/gp/product/B00NBI5OIQ?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s01

http://www.amazon.com/gp/product/B00O6UCGS4?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s01

I use these: A little heavy, but it provides roughly 2 full additional charges on my SP4. I typically use the 12V to increase the longevity of my battery, but it works just fine with the 16V setting for me and the charge rate is through the roof - I can literally watch my battery percentage increase about 1% per minute. :)

[note: I'm not sure that the 16V settings will work on your SP3. YMMV and hopefully it doesn't blow up.]

32000 mAh battery pack
adapter cable

I use the IntoCircuit PC-26000:
http://www.amazon.com/Intocircuit-PC26000-External-Battery-Smartphone/dp/B00BB5VQCE/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1449269783&sr=1-1-catcorr&keywords=intocircuit+pc-26000

Will charge phones or a Surface 3 via 5v 2.1 amp USB port, and has a selectable high voltage output for larger tablets and laptops (12v-16v-19v) so it can be used to charge a Surface Pro or Surface Book.

You'll also need one of these Surface Connect charging cables:
http://www.amazon.com/gp/product/B00O6UCGS4?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00

this one works well for me
https://www.amazon.com/gp/product/B00BB5VQCE/ref=abs_brd_tag_dp?smid=A2KV19AYUKS3X0 - 26,000mah

https://www.amazon.com/Portable-Charging-Charger-Microsoft-Surface/dp/B00O6UCGS4/ref=pd_bxgy_107_2?_encoding=UTF8&pd_rd_i=B00O6UCGS4&pd_rd_r=4MTYTFF0PQMFGCQS5M84&pd_rd_w=qA0Qj&pd_rd_wg=ATgn1&psc=1&refRID=4MTYTFF0PQMFGCQS5M84 this is the cable as this is a laptop charger and isnt bottlenecked by USB

I use this battery Intocircuit 26000mAh High Capacity Portable Charger External Battery Pack https://www.amazon.com/dp/B00BB5VQCE/ref=cm_sw_r_cp_api_6DsByb6RZR2YP with this cord "XIEMIN Portable Charging Charger Cable for Microsoft Surface Pro 3/Pro4 12 Inch Tablet (Pro 3/ Pro4 Charging Cable)"https://www.amazon.com/dp/B00O6UCGS4/ref=cm_sw_r_cp_api_XGsByb41HFSG8and it works awesome and lets me charge my surface more than once.

12V, not 15V. Your Anker battery with only USB ports won't work, you need something with a DC output jack.

This RAVPower battery is what I've been using for the past year. You'll need to set the battery to 12V output and connect it to your surface with a cable like this.

If you're uncomfortable charging your Surface with such a cheap, made-in-China cable, you can fabricate your own if you have a spare OEM power brick that you're willing to sacrifice if you have experience with soldering things (that's what I did).