Anker offers a 18 month warranty. The challenge Anker has the higher wattage of output the hotter the cells become along with hotter electronics doing the DC-DC conversion, so the thermals are compounded. The hotter, the faster the cells age. About 12W per 3400mah is a common maximum upper for quality cells, so a 26800mah is be able to do about 100W. Such a product would have some challenges of being rather hot, the failure would be higher and if any of the cells in the series connection could be caused to fry and then burn. Anker would then be exposing themselves to real risks of brand damage and worse, and if you imagined if it ever caught on fire on a flight in more than the rare situation what that would do the Anker brand perception.
There are many considerations here where the revenue earned from such higher wattage products come with potential downsides of greater loss.
Lithium Polymer can drive a higher wattage and new chipsets are more efficient so cause less heat in the DC-DC process. I do think what you ask for is eventually possible but I can see the challenge Anker has a business to run...
What I do is:
- I keep a server at home running a VM, which has a powerful cpu, lots of RAM, and fast drive. I use it via RDP, VNC, SSH to access its power from a low power device.
- I use a Chromebook around the house, if I I need to tap performance, use the above. It dooesn't physically like transit (I've had to replace cracked screen total of 4 times in 2 years across 2 heavily used Chromebooks)
- I use a Pixel C when I'm traveling, it is fairly performant, only needs 15W input, and RDP to any apps not on Android (such as Visio). It has a tough outer metal case and seems to be long term withstanding heavy use. When it dies I'll probably get one of the newer tougher Chromebooks.
- I use a Nexus 7 also for long flights, it only needs 10W input On a flight there's real risk of damage from liquid from clumsy crew, passengers and turbulence.
A smaller screen less powerful portable device will get more hours of recharge benefit than a larger device. There is a maximum of 100Wh for FAA and CAA so say my Pixel C 34Wh battery would get a little over 2 full recharges off 26800. Your Macbook pro late 2016 is (you werent precise which model so picking an example one) is 95Wh so that same 26800ma 100Wh would not offer a full recharge. So your Macbook would last half the time of my Pixel C.
If you still insistent on retofitting a post-decision battery solution to your existing laptop decision, then consider the Powercore+ 26800 PD (Note: there are about 7 26800 products so get that exact one) and then plug it in at every opportunity, e.g. when sat down, and use that slow the drain. In my case my most power hungry portable device is 15W but I usually carry just a 10W output Powercore and its often able to keep the tablet fully charged as 15W is really for both recharging and operating the tablet, chances are your laptop isn't needing 100W all the time. You'd probably find the 30W from the Powercore+ 26800 PD is sufficient and useful and available now from a brand you prefer. Or wait, I think a 60W is in the works but could be 6 months. I do own a 26800 15W output which in my case really gives a very long period away from the wall socket. The recharging is much slower but its still useful this approach.