Looking for a good 19v 3.5a or more DC to DC Li-Ion or similar UPS. Need it with a fairly high mAh rating since this is powering an Asus GT-AXE11000. Any good ones out there?
Out of curiosity what is the reason to not use a standard APC/Triplite UPS? You'd get more power/$ and could use the DC brick that comes with the unit for conversion.
I see a lot of 9v/2a but not 3.5a.
I've seen Laptop adapters meant for use in a vehicle (12V -> laptop voltage). Might one of these work for you?
I don't really care about cost. I am way more interested in overall runtime and energy density. I have a bunch of apc ups scattered around the home. The loss from converting the ups battery to ac and the the wall wart converting ac back to DC is what I'm trying to avoid.
What are your to and from voltages?
ok then send me a couple G's for the effort 
need more GME 
19v/3.16a with add-on batt option . Don't love charge side, but decent option
Input to the ups can be 110ac or any dc voltage. Effeciency on this side doesn't matter to me. Only on the output. The router is either 19.5 at 3.33a or 19 at 3.43a.
Why did i my eye see only 9 not 19 sorry. That one does 19 Volts, 3.16 amps continuous, 60 watts so close lol
I've been looking for a while now and haven't really come across anything commercially available that meets my needs. I could build my own for around 100 bucks or so but really don't want to go that route unless I can't find anything else.
So you need 19 - 19.5 volts out. What is the input voltage? I'm assuming you are tapping into the UPS batteries. Is this correct?
If 12V in, I was thinking of something like this Laptop 12V adapter
Looks like some built it for you - BiXPower Super High Capacity (256 Wh) Battery with Multi Output Voltages (12V, 15V, 16V, 19V, 24V) Uninterrupted Power Supply Function UPS250-DD90X
90w/19.5v=4.6a max right? Ohm always Fs me up.
It's continuous output on battery only is only 60 watts though which is less than the router uses. Ideally there would be at least 10% overhead since hardware rarely meets spec from china.
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