Hello my old laptop battery for my asus gl502vmk was swollen and it wasnt charging properly like forever saying 30 mins till fully charge etc. Therefore i got rid of it after about 2 to 3 years of usage. So should i get a new one? I keep my laptop plugged in 99% of the time. I dont have any problem with electric outage but the thing that's bothering me is firmware update because i can't upgrade my firmware without battery (can't bypass ez flash for asus).