Some people are more battery conscious than others, but some folks truly don’t mind letting their battery level get so low that it lurks in the danger zone — a state of inevitable automatic shutdown.
If you align with the latter camp and you’re using a jailbroken device, then this may pose problems for tweak reliability and usability because modern jailbreaks tend to be semi-tethered or semi-untethered. With that in mind, a newly released and free jailbreak tweak called Puck by iOS developer Litten may be a handy addition to handsets that see deeper battery drain than others on a regular basis.