Most new trailers have the lights sealed, but they do get cracks in the housing and they can get a cold blast of water on a hot bulb. Yet another area that is commonly overlooked when winterizing are the batteries. I know professional fisherman who carry extra batteries with them all the time and at the end of the year they are purchasing new batteries to replace ones that they either left in the boat or simply did not hold their charge during the winter. Therefore, I contacted Hawker Energy Products in Warrensburg, MO. and talked to Terry Elwell and Dwayne Dady about a new battery that they have on the market called Trolling Thunder. These batteries contain plates made mostly of lead that are surrounded by an electrolyte with sulfuric acid as its main ingredient.
Batteries produce power as the acid leaves the electrolyte and enters the plates.
The plates are coated with an active, paste like material, which actually does most of the work. When all of the acid in the electrolyte has entered the plates, power production stops. The battery must go through a recharging process that forces the acid out of the plates back into the electrolyte before it can produce power again. The conventional batteries use lead alimony, which contains impurities and this, lessens the life of the battery. When you recharge that battery you will smell the battery acid as it is being vented.