Hi @NeroBala ,
The automatic shutdown of your phone is not normal. For that case since you already experience the bulging/swelling of battery. I would suggest that back up all of your files via (SAMSUNG KIES) and have the phone check at the globe business centers to get the referral from them if its a globe provided equipment and its still w/in warranty.
You can check the samsung service centers (CLICK HERE).
Hope this helps,
Bulging battery = busted battery.
Like TERQZ said, back-up and try to claim warranty as soon as you can.
Do you use your phone, running apps with high requirements? e.g. games, facebook app, chrome while it's charging?
Do you turn off Data Internet if not needed?
Did you modify anything in developer mode?
What is the mAh and wh of your battery?
Do you use multi-window function?
Do you use a microSD and what type is it and it's class e.g. sdxc/class 10
Same problem here. I went to Globe Store to check my device and suggested the device to be repair because of continuously turned on and off as well as battery swelling. They gave me maximum of 3 months to claim it. By the way my s4 is 3 months old.