I've actually changed it on older iphones and it is super easy. Can get it done within minutes. iPhone 6, however, is a little different I believe.
I know Apple has the $38 offer now but have to go without phone for 3-5 days.
does the 38$ applicable to Iphone 5 as well?
The question applies if u got it changed before at an ah beng shop.... Like me
Nope. I changed it myself. You could buy a new battery that comes along with a kit for $20 on Lazada. Keep in mind this is old iPhone 5, so it didnt bother me using non-original battery.
Took me less than 5 minutes to change it up. Youtube has instructional videos.