[brucepick]

Sorry - can't read the spec info from the pics posted.

I suggest you write the actual information to a web post and then it could be read.

You want:
12V = 12 Volt battery (I think one of them is marked 24?? But maybe it's a 24 month warranty)

Marine batteries will give "marine cranking amps". As long as you have several hundred MCA you should be able to start a small car's engine as long as it's not a diesel.

Amp Hours is the big important spec. Also called AH. More is better. 10 AH capacity means the battery could provide 10 Amps of current for an hour. Or, could provide 1 Amp for 10 hours. Same thing. Plan on buying 1-2 batteries of somewhere around 50-60 AH capacity each if you want to cover any serious distance in your car with alt delete.

Seems my car draws somewhere around 10A, running with headlights off. Headlights themselves seem to be about 15A or a bit more. So you can do some math and you get the idea of how much AH of capacity you need to drive for an hour or two or three.

Plan on using only about 20% of a lead acid battery capacity before recharging it. If you discharge more deeply, you'll get very few charge/discharge cycles before the battery is "toast".

In this price range, you might be best off buying two of them, as big as you can stand to use. Hook them together in parallel (so you get the same 12 volts, but double the AH). You'll probably get 3x or 4x the life for 2x the cost, because you'll discharge the double pack less and won't kill it off so soon.