In that posture, with your feet flat on the floor, lift your right leg and place the ankle on the opposite knee. Reverse and repeat to stretch the muscle. Piriformis exercises also can be done lying flat on the floor, arms outstretched with palms facing the floor. Positioned about a foot from the wall, completely extend your legs and rest your heels against the wall. At that angle, rest one ankle against the opposite knee, just as in the sitting position.
Batteries, whether lead acid wet cells, AGMs or Gel should last at least five years. My Interstate deep cycle batteries are warrantied for seven. Now this supposes that you properly maintain them, and the number one reason for early battery failure is lack of, or improper maintenance. This is especially true of AGMs.
Under ideal conditions, one automobile battery can last up to six years, but several factors decrease this optimal lifetime. A study of 2,769 sample 12 volt batteries conducted in 2004 showed that the average lead acid battery life is 50 months. Batteries in the northern US had an average life of 56 months compared to those in the south which had an average life of 43 months. Lead acid batteries last longer in cold climates as warm climates increase water loss and sulfation. Car battery life span range is 2 to 5 years.