I have not tried things suggested, but they should work. It would be useful to know the answers for following question: What is the input and output ratings (voltage, current) of power adapter of the wifi routers?
Useful URLs: http://www.eleccircuit.com/regulator-5v6v9v12v-1a-by-ic-7805780678097812/ http://www.taydaelectronics.com/datasheets/A-207.pdf http://www.amazon.com/Linksys-Power-Adapter-12V-1000mA/dp/B000H7VCVW/ http://en.wikipedia.org/wiki/Automotive_battery Reply inline. On 04/08/13 3:05 PM, Mayuresh wrote: > On Sun, Aug 04, 2013 at 12:23:42PM +0530, ????? wrote: > >> What is compact according to you? 1cm x 1 cm x 1cm or 10 cm x 10 cm x 10 cm. > Well, I don't mind these dimensions... > > I am struggling to find a product in the this class in the first place. > It's a question of making do with what is available than looking for > certain specifications. Battery dimensions (http://www.whitedogbatteries.com/batspecs.htm) For 3 A/hr 11.4 cm x 7.1 cm x 8.6 cm You may also think of using the battery from your UPS directly (without converting it to AC). It could be more efficient. Voltage regulators: http://en.wikipedia.org/wiki/78xx http://www.recom-international.com/pdf/Innoline/R-78xx-1.0.pdf >> Can you share the details of the battery powered router which you are >> using? By performance, >> what do you mean? Speed is not as expected? Connectivity keeps dropping? >> etc. > I wrote a separate thread in PLUG on my experiences with Lava W150 as > against my older Linksys WRT54GL. Difficult to summarize though following > are some of the points: > > All problems are on intranet with 3G modem and ISP not in picture at all > > - Packet loss up to 30% > - Arbitrarily refusing to connect (ping/ssh/whatever) with another device. > With nothing specifically done, letting connect after some time. > - Limited range. (Sorry, I'm not going to measure and tell.) > - I worked around these by using WRT54GL as a repeater bridge of W150 You can use the router which you prefer; using battery+dc voltage regulator as per the specifications of router. >> Seems like you are look for >> http://en.wikipedia.org/wiki/DC-to-DC_converter > Not at all. I think I clarified in a couple of posts before. I am looking > for a battery backed up DC supply (sort of UPS minus inverter) and if that > is not available a miniature UPS (1mm x 1mm x 1mm most welcome!). Interesting read regarding battery capacities: http://en.wikipedia.org/wiki/Battery_%28electricity%29#Fast-charging.2C_large_and_light_batteries -- शंतनू _______________________________________ Pune GNU/Linux Users Group Mailing List
