The term trigger point was coined in 1942 by Dr. Janet Travell to describe a clinical finding with the following characteristics: Pain related to a discrete, irritable point in skeletal muscle or fascia, not caused by acute local trauma, inflammation, degeneration, neoplasm or infection.
A fresh alkaline zinc battery can have an open-circuit voltage of 1.6 volts, but an iron-disulfide battery with an open-circuit voltage below 1.7 volts is entirely discharged.
Also, it is not likely that your battery is ever completely dead. Even when the battery is discharged it can still have upwards of 9 volts. If you put a voltmeter on a battery and you get a reading of 0 volts, then you may very well just need a new battery. The fact is though that 95% of batteries are never fully discharged when they need a jump start.