My 2006 G coupe has been sitting for about 2 months in the snow. I didnt unplug the battery because im buying a new one anyways. I couldnt store it in my garage because my roomate had his car in there but hes movin it out so I can do some work on it. How long should I plug my car in for (block heater) before i can safely start it. Also, is it bad to try and boost a battery thats been sitting in the cold and probably frozen? I know it probably wont work but i thought I might as well try.

Sorry if these are stupid questions but I tried searching and couldnt find anything and i dont want to start it and my block cracks or something
Thanks!

I'm not sure which battery charger/starter you have but the one I have has a gauge where you can see how much charge the battery has. When that gets close to 12Volts then you can start it.

it would probably be easier just to take the battery out and just recharge it at autozone for free.

Your best bet is to buy a "Battery Tender" They are only about 35 bucks and it will keep your battery at peak charge over long periods without frying it. I use it for my motorcycle and Mustang. A quick charge might not do the trick after so much time. Just don't rush and let your car "Thaw" out for a day in the garage.

All you guys are doing substantially more than I would. I would just try to jump it and call it a day. How long you charge it depends on the the battery and the charger. If you're going to PURCHASE a charger, find one with an volt reading and just charge it to spec...however long that takes.

I agree if it was here in Cali but I'm sure that being in freezing temperatures for that long might make a difference.

What have the temperatures been for 2 months where you are?

I would say just jump it off and run with it. The battery shouldn't explode.

Nothing will happen if its frozen. Plug it in for maybe 4 or 5 hours, anything more is doing nothing. If the battery is frozen it wont accept a charge, if the sides have bulged you know its a goner. Even if its "okay" after you recharge it, it's not going to last if at any point it actually did freeze. The chemical makeup is irreversibly changed.

Source: Canadian.