Any recommendation for a 12V power bank with 2A peak current. I was searching and I couldn't find any reliable/known brand like Xiaomi. Any other options are welcome (like using 5V power bank with converter, but in that case 5V power bank should have at least 4.8A rated current).
12V 2A (Peak) Power Bank
ebbzuv on 26/08/2015 - 15:53
Last edited 26/08/2015 - 15:53
Last edited 26/08/2015 - 15:53
Comments
Its for a wireless modem/router. The spec says 12V with peak current of 2A.
No one I know makes what you are after at a reasonable price. If you are handy, you could make it yourself for under $100 with a massive 5000mAh capacity.
I would use a RC car battery pack (http://www.ebay.com.au/itm/151484787712) (and use an RC car battery charger to charge it), along with a high-efficiency voltage regulator (http://www.ebay.com.au/itm/171465175084), and then solder on a cable to the output of the regulator to the modem (http://www.ebay.com.au/itm/261328820174), and cables to the input of the regulator with the right connectors for the battery. Then you could put the whole thing in a "project box" from altronics or jaycar and you would be good to go.
As it is 12V, you might consider using a DC car socket from supercheapauto, and then that gives you a generic 12V portable power supply that you could use for different things in the future. You could then use a cable like this (http://www.ebay.com.au/itm/181847145618) to power the modem.
I imagine there would be a niche market for people to manufacture a product like this…
Thanks for the detailed reply with components and I really like the idea of building a proper/voltage regulated setup.
BTW, what do you mean by DC car socket? Is it just the socket or some sort of voltage regulator? If its a socket why can't we use the cable directly?
@ebbzuv: I mean that you could put a cigarette lighter socket on the case so that you could plug in other lower power 12v devices designed for use in the car. You could just use a cable, its totally up to you!
By the term "power bank", do you mean a battery power supply, or do you just mean a mains power supply?
I'll assume a battery supply. How long do you want to run the modem/router for?
A battery pack that can provide a peak current of 2 amps is only part of the specification, you also need to know the capacity in amp/hours, and from that, you can work out how long it will run the modem/router.
I think there should be what I'd call a 12v UPS available, but I can't find anything locally. A possible solution would be a car battery and a multi-stage charger, but it's a bit messy, not to mention costly.
Something like this?
http://www.dx.com/p/portable-6800mah-emergency-rechargeable-…
There are quite a few different lithium packs available, but look out for reviews as some cheaply made lithium batteries turn into explosives after a few cycles.
How close does it need to be to 12V? What are you powering?