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.
How long will an electric car battery last? The lithium-ion battery pack in the Tesla Roadster is projected to have a lifespan of about 5 years or 100,000 miles. At the end of that time the pack will need to be replaced, at a cost of approximately $10,000. Sure, that's expensive, but the Roadster itself will cost almost $100,000, which makes the cost of the battery pack seem affordable.