AGM (Absorbent Glass Mat) batteries offer quite a few advantages compared to standard motorcycle batteries. They are leak-resistant, the sulfuric acid is bound in glass mat fleeces between the plates. They are sealed and can be installed tilted by 45°. During normal use they will not gas, so there's no destilled water to be refilled. Due to their construction they deliver about 1/3 more cranking amps than their "wet" brothers, which you have to check for fluid level often. These batteries are not perfect though: whenever your mount is left unridden for a while, you have to maintain them by a charger.

The batteries are filled and leak-proof sealed only before dispatch. The battery should directly be connected to a battery charger after unpacking and charged according to the instructions.