Serious Iphone 6S battery

[SNTCK]

Anybody using iphone 6S?
I realise my hp battery can only last for 1.5hour max if I using it to surf net.
Or fb.

Is it normal? I always think my battery got some problem.

Went to iphone service centre, they told me my battery is ok!

Very sianz!! Refused to give me new battery! Then

 

[mojito]

Wow not bad. Battery last longer than my 4 year old laptop on wifi.