Running two batteries

[recoil]

OK, I have now finished my car putter install, ATM its running off the main battery I dont want this to be the case. I dont want to wait 20-30 secs for the computer to turn on, I want it to be there ready and waiting, it would also be nice to run a wireless network so I can conect to it from home to upload music.

So I have another battery, that will run the computer all the time nerver get turned off, the battery will only be conected to the main battery when the engine is running (use of a relay).

Now is a 30/40 amp relay OK to go between two car batteries

[madbasshunter]

This is what you want Ali split charge rely .

[recoil]

Yeah thats what Ive got, I wasnt sure if 30/40 amp was fine for the job

[chrisE]

99% of Carputers run off the main battery and take 10-15secs (if configured correctly) to boot using Hibernation, so why would you go through all the work needed to fit a second battery?

[recoil]

Beacuse I want to, and like I have already said it would be good to run wifi on it too, then I can upload music to it from the home network

[colsmr2]

why not fit a bluetooth, add a second pc on the network save lots of trouble,