Car batteries are designed for a high load at a short duration. They don't provide as much power to a trickle load like an access point. A gel cell or AGM type battery and a lot of marine batteries (commonly deep cycle) provide better support for low volume loads. If I were looking for the most cost effective means I would go with a marine battery and see how well that works. if it is not sufficent then Gels or AGMs are the way to go (although even a 33 AH AGM battery can run you $50 and a 100 AH is $125). Depending on the voltatge input range for your device, you willl need DC-DC converters. I noticed that a lot of the PoE APs have a wider input range then walwort powered APs. For example a wi-lan VIP110-24 can be powered direct from battery as its range is greater than LVD and HVD cutoffs.
On Sun, 23 Mar 2003, Roberto Ramirez wrote: > I was thinking something like a solar powered unit. by using a car battery I > could save some money on the batteries. I was checking out some websites and > the get pretty expensive but I guess its because of the no- maintance type > of batteries. > > -- > general wireless list, a bawug thing <http://www.bawug.org/> > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless > -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
