So I was working on the car again today and fixed the radio, seems like the last person didn't wire it too well, I had the car off the whole time and have the interior lights all turned off to not drain the battery. So when I turned the key to acc and started setting channels for the radio, the radio started to reset itself, I thought it was a bad head unit but when I tried to start the car the battery was dead. I jumped the car and it ran but ended up taking the battery out and replacing it with a new one since the sticker said 2012 and i'm sure it's toast...ANYWAY, after putting in that new battery I started the car and the charge level on the dash was 0...no bars at all. It was 95% full with the old battery. Is this normal or is something else wrong?