Does Anker currently make a portable power charger with multi voltage output capabilities similar to a past item the Anker Astro Pro2? I am looking to be able to charge a laptop that requires 19volt. I know Ravpower makes one but I would prefer Anker.
Multi voltage output
No, a quick look indicates nothing of your ask. They make laptop batteries.
What I have and do, is I have a powerful Thinkpad with its 19V input, a more efficient slower Chromebook with 19V, and a Pixel C with a USB-C 3A input. When I’m traveling with possible no access to mains I use the Pixel C and I pair with the current Anker USB-C products. Usually the Powerport5 USB-C and either the Powercore 10000 or Powercore 26800.
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That’s interesting as I have never clicked the battery section thinking it was battery packs for smart phones.
Unfortunately there is nothing for my Asus. I clicked a few and most said unavailable but that may be because it is Amazon Canada. The few that were available were really expensive. An external pack that can be used when I need it which is only a few days a year and could multi purpose it elsewhere would be the way to go for me. I sometimes use an Inverter when camping but it would be cool to be able to have something more portable and my laptops battery only lasts about 1.5 hours. My chromebook lasts 10 hours but has limited capabilities (none) when away from internet or mobile data service. I wonder why they discontinued the Astro Pro2 as it had really good reviews
A Chromebook has a lot of offline capabilities but I accept is less powerful. My Chromebook has a 128GB SD card, I unlocked it (developer mode) and installed Linux and can run Windows. Chromebook can offline a file in advance.
Your main problem is not voltage but Watts and Watt-hours, any portable power must be quite large. In the same way an Anker external pack is many times larger than the internal battery it charges.
Anker has the Powerhouse to which you can use your existing mains adapter or inverter up from 12V so yes they do make something, at a cost…
What I do is downsize to a tablet and then the Powerport5 USBC with Powercore 26800 gives me a couple of days of off grid capabilities, accepting it’s not a full laptop, the gain is in portability.
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my Asus is 120 watts at 19 volts or roughly 6-8 amps per hour off my 400 watt inverter hooked to my deep cycle 6 volt series connected golf cart batteries. If my laptop battery was a bit stronger I wouldn’t have an issue… The 26800 if it had 19 volt out would give me about 3 hours, not much but enough for me. The chromebook although we bought the best they offered 16 months ago belongs to my son for school and I have be given the red light on messing with it, and I find it challenging to use (hate the keyboard) speaking of portable power supply check out the video of the one I made and am using, fricken heavy!
We have 4 Chromebooks and I repaired 2 of them (cracked screen). They are the best value laptop. You do get what you pay for, tend to be slower but that helps with battery. I have the Toshiba Chromebook 2.
So yes if you take say 2 6V batteries in series to make 12V, then have multiple of those 2 in parallel to gang together for Amps then the 12V output into an inverter makes mains.
Or, you could take 3 6V batteries in series to make 18V, then multiple of those 3 in parallel to get the required Amps and plug directly into your laptop. If you use Li ION 18650B types which are typical in Anker products, each is a 3.7V output, if you stacked 5 of them in series you would get your 19V with the Ampage of one battery, you’d risk overheating if you had just 1 series, so cable in parallel multiple of the 6 series, e.g. 3 sets of 6 = 18 batteries made up of 3 parallel of 6 serial. You’d cable to the shape connector to your laptop. You’d not need an inverter then. Total is about $4/battery x 18 = $72 plus some cables etc. The main problem here is safety, if you had any kind of problem you’d risk fire. The main benefit is it energy efficient as no inverter, no DC-AC-DC losses so you’d get more laptop power per weight of batteries.
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now to shrink it all down to fit in my pocket 
If you want to shrink everything down then just go with a tablet, my smallest one is a Nexus 7 I got for $89 a year ago and it lasts quite some hours and is rechargeable with the smallest of Anker products like the Powercore 10000, and if I’m expecting to do typing, a keyboard case.
For “uber small” I just use my mobile and carry a replaceable battery and fit a 64GB SD card to have lots of videos offline.
The lowest power devices lend themselves to solar recharging as happy on 1A type input you typically get from a 20W panel (less useful in Canada this time of year!)
The “medium small” I use a Pixel C with its keyboard, it is USB-C 3A input but most Anker Powerports output 2.4A so its still pretty fast to charge.
My larger one is the Chromebook.
The largest is a traditional Thinkpad which has your problem but I don’t travel with it where I expect long time off-grid.
I tend go with the Pixel C as big enough to use for long time and compatible with most Anker products.
Not the answer to your question, obviously.
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@nigelhealy lots of good advice, I like the tablet/external keyboard idea as I have a few keyboards. When Trump gets our oilsands pipeline from Alberta to the States back up and running I will have some money to spend, economy has taken a pretty big shot here over the past 18 months so I will work with what I own right now and hope some companies send me a tablet to review. I have an ipad air pro that I use for work but hate using it and I have no experience at all with a tablet…Is it just a big Android? or big windows phone? can you use usb for storage? I do lots of video editing so need the storage…Thanks for all your help 
A lot of car jumpstart battery packs have laptop charging outputs too (DC) at 19V, 12V and I few more voltages I believe. Typical USB battery packs do not. Check out DBPOWER and other products.
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