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.
Typically, it may take 3 to 4 hours to charge any type of AA battery; however, all these depend on your requirements. Charging Time for Different Types of AA Batteries. Nickel-Metal Hydride (NiMH): Ultra Fast AA/AAA battery chargers take about 4 to 6 hours to simultaneously recharge four batteries. Conventional battery chargers may take up to 8 to 10 hours for charging two batteries.