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 should a deep cycle battery last? I'm wondering if deep cycle batteries have the same short lifespan as normal car batteries. Mine is only 2 years old and when I put it on charge the charger goes to max current for a few seconds, then off, and repeats, but the battery clearly isn't taking any charge. It has water, although I can't check the electrolyte.