Battery Charge

[BATOYGIO]

So I started up the car today after almost a month of it in the garage expecting it to have a low charge on the battery (engineer mode). When I started it had a little sputter but started just fine and I saw that the battery % was at 0.0%....If the battery was drained how did the car start and run? I drove it around the block a few times and got it up to 10% because I didn't want to drive too far through salt and ice etc. but Im going to charge it up some more tomorrow. It'll probably be in the garage for another week before I start taking it out again hopefully, is it worth it to disconnect the batter for that little time left? Also if I disconnect the battery, what will be erased when I re connect it? Thank you

[DRCUSTOMPARTS]

I charged mine with it connected. Just make sure you connect the positive first when attaching the leads from the charger and last when disconnecting the leads so there's no spark.