Hey all-
I'm getting started on the planning process for doing my own car based computer. The big thing I want to know is, how long would a deep cycle battery last if it was giving all it's juice to a computer?
I really think my math is wrong, but here goes.
I'm thinking approximately 80watts will be the average draw for this computer, with hard disk being a low power laptop model, and probably going to use a pentium 3 for the system. I was looking at the Optima D34M Marine model, and it says it has a 120 minute life at a current draw of 25amps.
Does that mean, that since 80watts pulls about 6.7 amps on 12volts, that I'll maybe get 5-6 hours of life?
(Watts) = (Amps) (Volts)
80 = x = 7.46amps
-----
12v
120 minutes x 25 amps = 3000 available
3000 / 7.46amps = 402 minutes.
Is this right? Am I smoking crack?
I want to be able to keep the machine turned on for lengths of time without the engine running. I'm going to set it up with Wake On LAN, add a 802.11B bridge and then sit comfortably in my chair, send a wakeup packet, wait a bit, then copy files to my car, or login via RDP. Return it to Suspend mode when done.
Thanks for your help!
Linear Mode
