It looks to me like the Lind Electronics "12VDC Battery Back Up Module" solves the problem of simultaneous running and charging, whereas a charger-only cannot.
I mentioned component #3 of option #2, the AC to DC Adapter, only because that Lind Electronics "12VDC Bettery Back Up Module" requires...
For my 100 hours of 12v/12w, I'm trying to decide between an off-the-shelf solution, and a mostly-off-the-shelf solution.
Option 1:
The off-the-shelf solution was suggested by the "UPS Selector" at apc.com
http://www.apc.com/tools/ups_selector/index.cfm
1. APC Smart-UPS XL 2200VA 120V...
Isn't 24 hours * 4days & 1A = 96 amp-hours? If so, then if I limit it to 3 days instead of 4, then the 105 AH battery you linked would result in 69% draw-down. Since this is for unexpected emergencies, would such a battery survive, say, three such discharge cycles?
When you say a "small wall...
I have a custom 12Watts/12Volts embedded device. It normally will be connected to either 110VAC or vehicle 12VDC, but needs to go for 3-4 days continuously in case of power interruption.
A car battery 12V/1200WH seems to be the perfect match, but then there are the issues of packaging it and...
The company I work for will not be going to SMT until 2008, believe it or not. In trying to track down a through-hole version of an SO-DIMM-200 connector, I found one at
http://www.adexelec.com/connectors.htm
called "CONN-DDR-SOD-200-STD" with the description "DDR SO DIMM, 200 pins, through...
