I spoke to my mate and he told me to JB again but not to install the options for multitasking and battery % as this will save some battery power. And fair do it has. But something is still eating the battery!! I tried the following as he suggested below. Wifi is off as is 3G cellular data is also off. Which does seem to keep the battery working fine (I assume its just in phone mode now?) But this seems a bit pointless as im unable to use the internet and when i do it kills the battery! :/ very confused! I have done is Unlock the phone to work on any network which works (as i needed to for travels) Anything else i can turn off in cydia to stop it eating the battery?