Generally speaking there are two different types of lead acid battery, Starting and Deep Cycle. If a starting battery is routinely deep cycled (discharged below 20%-50% of max capacity) it will generally fail after 30-150 cycles. The same starting battery will last for thousands of cycles if it is just used normally (2% - 5% discharge).
These phosphates precipitate the solids to the bottom of the boiler drum. At the bottom of the boiler drum there is a bottom blow to remove these solids. These chemicals also include anti-scaling agents, oxygen scavengers, and anti-foaming agents.
10. Sulfuryl Fluoride. Termite tent, courtesy of the Monterey Public Library via Flickr.com. The new kid on the block, MIT scientists identified this chemical as a greenhouse gas on March 11th, 2009. Used as a fumigant, Dow Chemicals produces sulfuryl fluoride to kill termites. The chemical, which is highly inert, has a lifetime of up to 40 years, and traps 4,800 times more heat per molecule than CO2.