No, it doesn't require a charge to keep the parking brake on, but does use a bit to engage/disengage. Key thing with lead acid batteries, is they need to be kept "full" to have a long life. It's not like your phone where you can "kill" it and charge it back up to full...you have to keep them full.
In the market now for a new one for a 2016 Civic. Not too bad life for OEM considering I probably deep discharged it a few times messing w/the head unit ([cough] hondahack). Definitely go with Costco. It's $45 - $60 more anywhere else (Autozone, Walmart, etc.). If you don't have a costco...
Also, I should mention, I thought I completely borked my car. I was sitting in it for a while messing around with installing new Honda Hack features (Play Store, YouTube) and that's when everything went haywire. Had nothing to do with what I was doing...was just a low battery.
Hey coffy42,
I had a very similar event. Was messing around with Honda Hack in my 2016 (been installed for well over a year) and I was installing Google Play Services and YouTube. Suddenly, the screen shut off and lights started flashing. I hit the Start button again, going from ACC to ON, and...