BatPower ProE 2 ES10B 148Wh MS Surface Power Bank for Surface Book 3 2 1 External Battery Surface Laptop 4 3 2 1 Surface Pro X 8 7 6 5 4 3 Go Portable Charger and Surface 120W Slim Charger Adapter

This is honestly my first product review on Amazon and the only reason I'm leaving the feedback is because of how amazing this product is. 40,000 mAh external battery!!! This thing is a beast! Just to put it into perspective, you can go well over a week with just this and your iPhone (or any other smartphone for that matter) without ever having to plug into an outlet... Beyond that, I am able to carry my Surface Pro and all my other electronics (iPhone and Bluetooth headphones) and leave all charging accessories behind besides this. It has a neat, soft, breathable travel bag to go along with it and fits all the necessary cables and items I need for it. It comes with the A/C charging brick if your hunkered down at home or a hotel and while your on the go, you can plug into the external battery. Literally, THE ALL-IN-ONE BATTERY. Couldn't be happier with the purchase. I've only had it for a couple of days so time will test the durability, however, the performance and functionality is superb.A thorough review should always contain feedback as well and my tiny bit is; it has an indicator light to show when it is actively charging (which is great, surprisingly, not all external batteries do that). My only suggestion is that instead of the light blinking on the first indicator light, it should blink on the corresponding light to show it's current battery life. Honestly, not a big deal at all. I'm detailed and a stickler for small details. Regardless, still a 5-star product all day, every day.

Purchased this as I am away from a power supply many times and wanted to ensure I had all the power to keep me running through the day, this does the trick.Yes, it is a little big and heavy but a HUGE capacity for 40000mAh.Because of it's high capacity it has DC 90W for charging my MS Surface devices and three fast USB charging ports for cellphones or tablet, also has two way input recharges for this power bank(90W and 15W).The power bank Including the 90W slim multi-function ac apapter you can directly charging for Surface devices and cellphones.At full charge it can charge my Surface Laptop around 1.5 charges and my iPhone at least 10 full charges.It's not waterproof so be care should be taking when camping or in outside pursuits. You could perhaps put it in a dry bag to protect it.Overall, I am very happy with this.

I ordered this after reading the specs and reviews, since I have a Surface Pro 3 that is circa 2014 and my built-in Surface Pro 3 battery life had been reduced to less than one hour on a full charge. I love the Surface because I travel a fair amount and being able to work after boarding the plane, during takeoff, and during landing, are big deals to me. So the Surface is great since it isn't a laptop and is allowable for use at all times on board aircraft. But due to my lack of battery life, I was losing productivity on my flights and on short airport layovers if I couldn't find a convenient electrical outlet to charge my Surface.This monster of a backup battery comes with a nifty Surface Pro 3 charging cable that serves as a replacement for the standard charger, but hooks up to the BatPower ProE2 backup battery. I've used this thing on 4-hour flights and it still has half a charge left when I land. This includes me charging my phone as well while simultaneously charging my Surface Pro 3. I've carried backup batteries for years, but never one capable of charging a tablet as large as the Surface Pro 3. And while it is larger than any other battery that I've every carried, it's not overwhelmingly large and I don't mind its extra heft given it's awesome output and lasting power.So far, so good on the quality of this battery. It looks great, looks very well made, and seems to be working like a charm. I've only had it a couple of months, an unless something drastically bad happens, I won't be updating this review again. I'm pleased with my purchase and I checked this aspect beforehand since I travel a lot: You may need to check with individual airlines to ensure that this battery is okay with them to be transported on board due to it being over 100Wh. I checked with Southwest Airlines and they had no problem with it, and I travel Southwest most of the time. I will be checking with other airlines if / when I travel on them, as I would hate to have any issues at the airport with transporting a battery of this capacity. The TSA has no issues with this battery as long as your airline allows you to carry it on board. So just do your homework on various airlines that you travel and this battery should serve as a good option to extend your battery life on the Surface Pro 3.

The good news to start -- this is a solid combo of a large WH battery and charger which allows you to (theoretically) use/charge your Microsoft Surface Pro or other device, along with multiple other devices, all simultaneously. The battery pack is heavy, as expected, but smaller than most direct competitors and worked well for roughly the first year.Now the bad news - after about a year the battery pack totally stopped holding a charge. I can now plug it in, leave it charging for a day, and upon disconnecting the charger the battery pack will not put out any juice at all. While this product is advertised as having a "30 day money-back guarantee and 18 month warranty", I was never able to get a response from the distributor or manufacturer to attempt to get it repaired or replaced under that 18 month warranty. I have been trying since January without any success.The charger does still work, so I at least have an extra Surface charger, but it most certainly isn't worth over $150+ for a battery which lasted about a year and under 200 charge cycles, and which claims a non-existent "warranty." All in all, I would strongly advise against buying products from this company.