powerdome charging

[jokerjustin]

well my parents got me one of these for christmas as a powersupply at my local track... i love it but im worried about charging it.
its a lead acid battery and its supposed to take 36 hours to charge.. im just worried as i wanna always have it topped off so i dont know how long to leave it charging...

it has a voltmeter built in which will tell me the voltage but when should i stop it? it goes all the way up to 15v even tho the battery is a 12v?

i just dont want to damage the battery by charging it to long

http://www.autobarn.net/wag2254.html