Magnet Morelli

These types of batterys in general are nice in that you don't have to always worry about water level. But, they are more sensitive to the type of charger or battery minder used. It should be specific to Gel Cell battery. Here is some more (too much) info off the internet:

A gel battery (also known as a "gel cell") is a VRLA battery with a gelified electrolyte; the sulfuric acid is mixed with silica fume, which makes the resulting mass gel-like and immobile. Unlike a flooded wet-cell lead-acid battery, these batteries do not need to be kept upright. Gel batteries reduce the electrolyte evaporation, spillage (and subsequent corrosion issues) common to the wet-cell battery, and boast greater resistance to extreme temperatures, shock, and vibration. Chemically they are almost the same as wet (non-sealed) batteries except that the antimony in the lead plates is replaced by calcium, and gas recombination could take place. The modern Gel formulation and large scale production was from Otto Jache's and Heinz Schroeder's <US Patent 4,414.302> assigned to the German Co. Accumulatoranfabrik Sonnenschein GmbH . With gel electrolyte the separator was no longer such a critical, hard to make component. and cycle life was increased in some cases dramatically. With gel electrolyte a number of the shedding of active material failure problems were eliminated. More importantly real gas recombination was used to make batteries that were not "watered" and could be called maintenance free. The one-way valves were set at 2 psi. and this was high enough to have full recombination take place. At the end of charge when oxygen was evolved from overcharge on the positive plate It traveled through the shrink cracks in the gel directly to the Negative plate made from high surface area pure lead and "burned"(three phase catalytic sites—gas, liquid, and metal) up as fast as it was made. This oxygen gas and the hydrogen adsorbed on the surface of the sponge Lead metal Negative burned to make water that was retained in the cell and not vented as gas. This sealed /non-spill feature made it possible to make very small VRLA batteries (1 –12 Amp hr. range) that fit into the growing portable electronics market. A large market for inexpensive smaller sealed Pb/Acid batteries was generated quickly. Portable TV, light for news cameras, children's toy riding cars, emergency lighting, and the growing market for UPS systems for computer back-up, to name a few, were powered with small sealed VRLA