car wont start v. 2

[jd1828]

Im going to get a new battery from checker and see if that helps. I know Ive asked this before but why is the spark plugs for a 2g different from the 1g. About a month ago the car fouled the plugs (some bosch platnums). I still had a box of the bpr6es left over from my 1g so I put those in. Car has ran fine since then but when I tried to get new plugs from checker they were a different number.