My iPod touch 4g with iOS 6.1.3, drains battery quick

I always have my wifi off unless I proper need it, bluetooth always off, brightness always down, auto lock 1 min

 

Yesterday I was downloading more apps (using wifi) and first I charged it to over 3/4 then downloaded apps and my battery was dead in 20mins

 

I have battery doctor to try and help I got this info about my iPod

 

 

 

 

Model iPod touch (4th gen)

Version 6.1.3

Jailbroken no

 

CPU apple a4

Frequency 800mhz

Size 111 x 58.9 x 7.2

Weight 101g

Screen size 3.5"

Screen resolution 960 x 640

Pixel density 326 ppi

Battery voltage 3.7

Battery capacity 929 mah

Wifi 802.11 b/g/n

Bluetooth 2.1 +edr

Rear camera 0.7mp

Front camera 0.3mp

Three axis giro yes

Orientation sensor yes

Distance sensor no

Ambiant light sensor yes

 

I always remOve apps from the multitasking bar

View the original article here