Qi-Infinity Powergrid 34200mAh External Battery Pack/High Capacity Power Bank charger for Laptops, Notebooks, Netbooks, Tablets and Smart Phones

I write reviews when I'm really peeved about a product and when I overwhelmed with JOY.Lets start with cosmetics:Its one of the prettiest banks out there. this unit is beautiful. I especially love the LCD display that tells me what this thing is doing. It has a % meter. It can select from 9,12,15,19 and 20v. It tells you when something is plugged in the USB ports and when its charging thru the round output port that goes to your laptop.Whats in the box?Well my order came today 1/5/2017, it had almost every adapter out there for every laptop. it had my lenovo charger tip. It had a micro usb, it had the CHARGER inside and best of all it has a Surface Pro 4 charging cable INSIDE the box. So no need to BUY another one like all the other reviews say.Well how does it perform?Best thing about this bank?!?! the selecable voltage output like i said above. Normal Surface Pro 4 wall chargers are at 12v and charge at a rate of 10,000 millivolts. Well since this puppy can change to 16v thats the charger output for the i7 SP4 i instantly get it to charge at 16,000 millivolts. that translates to fast charging. it went from 80% charge saying it will take 1hr 50 minutes to a full charge @ 12v to 40 minutes to full charge at 16v. That alone is worth it even if the power bank doesnt work at all. Fast charger!! I'm in love. As you can see from the photos as i change it from 12v @ 10,000mah charging to 16v @ 16,000mah fast charging.I bought the lizone 35k bank and was dissapointed @ $99, this one is $149 much nicer design, lcd panel is the best. selectable voltage output is another super big plus.this guy is pretty big, you not going to hide this thing in your back pocket. there is a coupon floating around for $15 bucks off this bank so it will bring it down to $135. definatly recommend getting it just for the mere fact that it will fast charge your SP4!!I'll update this review if it under performs when its fully charged.

While it's a tad bigger than I'd prefer, it's a small trade-off given how much I travel and how heavily I'll likely rely on this for anything from email to presentations, websurfing or entertainment whenever outlets are hard to find or are already spoken for - which happens a lot.My first "field test" consisted of plugging a fully charged Qi-I into my Surface Pro 4 that was at only 6%. Once I was sure to get the voltage set right (which was pretty easy) the charging began immediately. I streamed Netflix non-stop for almost exactly 3hrs at which time the SP4 was fully charged and the Qi-I was still at 50%.So in summary, if I was stuck somewhere without a wall outlet this charger could provide me with nearly 16hrs of non-stop Netflix. (~5hrs of play time for each full charge (2x) that takes 3hrs to achieve.) While that's way more Netflix than I /should/ be watching at one time, it does have me feeling confident that I will no longer have to circle a restaurant or lobby looking for an outlet to sit next to so that I can get some work done when traveling and that juice for my SP4 and mobile device will never be an issue again.It's worth pointing out that while this does come with nearly a dozen adapters (including a cable for the SP3) I did need to pick up the following cable so that it would work seamlessly with my SP4: XIEMIN Portable Charging Charger Cable for Microsoft Surface Pro 3 12 Inch Tablet (~$8 at the time of writing this.)My only complaint would be the lack of some sort of soft bag or little case to hold this and all of the adapters and chords that come with the charger. There really should be some way to tie these up or store them easily, especially at this $149 price point. Having said that, if you've got a pack or bag solution that will allow you to store this and all of the cables easily and you don't mind the extra ~2lbs then this is a pretty solid choice, in my opinion.

I recently bought the Powergrid to take on a trip out of the country. I knew there would be limited use of electricity at times. It worked well with my Surface Pro 2, my smart phone, multiple cameras and other items. I purchased this one because of the size in mAhs, but it is a bit large and weighty,so I would recommend a soft carrying case of sorts. You cannot put it in packed luggage when flying so make room for it in your carry on bags. I particularly liked the idea that it came with the appropriate cord for the Surface, and it did not seem to take long to charge the computer. (I am not sure about the speed of charge because I charged during the night while asleep.) I am pleased with the Powergrid, and will put it to use while home to make sure that it is consistent.

I heard about this product from my son who uses it to charge the multiple ipads his children have. He has had it for a couple of years and uses it a lot. I have only used it once to make sure that I know to operate it. I am using it for a trip to South Africa this summer. I will be traveling with a netbook, iPhone, and ipad etc. For 3-4 days, while on safari, we will have no electricity except for a central hub in the middle of camp. (We will use this central hub to charge our camera batteries. )We will use the Infinity to charge the other items. We take a lot of pictures and I upload them on the netbook every night as well as write a narrative about what happened this day. Selected pictures and narrative end up in a photobook for memories. I would have a very difficult time putting these pictures on the netbook every night if I didn't have the extra charge capability of the Infinity..