Anyway, Mr.TT can you show the science and chemistry that confirms that it does not work?
If you mean, will completely draining damage the ordinary lead acid battery in an SOHC4?
Yes.
However, all the information is readily available on the internet.
Of course, not all batteries are the same, or even employ the same technology, chemistry, or plate separator mechanics. You most certainly can't treat them all with same approach as you suggest.
Electrochemistry
In the charged state, each cell contains electrodes of elemental lead (Pb) and lead(IV) oxide (PbO2) in an electrolyte of approximately 33.5% v/v (4.2 Molar) sulfuric acid (H2SO4).
In the discharged state both electrodes turn into lead(II) sulfate (PbSO4) and the electrolyte loses its dissolved sulfuric acid and becomes primarily water. Due to the freezing-point depression of water, as the battery discharges and the concentration of sulfuric acid decreases, the electrolyte is more likely to freeze during winter weather.
Discharge:
During discharge, both plates return to lead sulfate. The process is driven by the conduction of electrons from the cathode back into the cell at the anode.
Anode Reaction: Pb(s) + HSO4 (aq) → PbSO4(s) + H+(aq) + 2e−
Cathode Reaction: PbO2(s) + HSO4(aq) + 3H+(aq) + 2e− → PbSO4(s) + 2H2O(l)
Recharging:
Subsequent charging places the battery back in its charged state, changing the lead sulfates into lead and lead oxides. The process is driven by the forcible removal of electrons from the anode and the forcible introduction of them to the cathode.
Anode Reaction: PbSO4(s) + H+(aq) + 2e− → Pb(s) + HSO4(aq)
Cathode Reaction: PbSO4(s) + 2H2O(l) → PbO2(s) + HSO4(aq) + 3H+(aq) + 2e−
Depth of Discharge (DOD)
The Depth of Discharge (DOD) is a measure of how deeply a battery is discharged. When a battery is 100% full, then the DOD is 0%. Conversely, when a battery is 100% empty, the DOD is 100%. The deeper batteries are discharged on average, the shorter their so-called cycle life.
For example, starter batteries are not designed to be discharged deeply (no more than 20% DOD). Indeed, if used as designed, they hardly discharge at all: Engine starts are very energy-intensive but the duration is very short. Most battery manufacturers advocate not discharging their batteries more than 50% before re-charging them.
Starting batteries
Main article: Car battery
Lead acid batteries designed for starting automotive engines are not designed for deep discharge. They have a large number of thin plates designed for maximum surface area, and therefore maximum current output, but which can easily be damaged by deep discharge. Repeated deep discharges will result in capacity loss and ultimately in premature failure, as the electrodes disintegrate due to mechanical stresses that arise from cycling. Starting batteries kept on continuous float charge will have corrosion in the electrodes and result in premature failure. Starting batteries should be kept open circuit but charged regularly (at least once every two weeks) to prevent sulfation.
Starting batteries are lighter weight than deep cycle batteries of the same battery dimensions, because the cell plates do not extend all the way to the bottom of the battery case. This allows loose disintegrated lead to fall off the plates and collect under the cells, to prolong the service life of the battery. If this loose debris rises high enough it can touch the plates and lead to failure of a cell, resulting in loss of battery voltage and capacity.
Starting battery plates are often porous, in order to increase plate surface area in a small physical size plate dimension. Discharging produces lead sulphate which fills these pores and effectively reduces their active area, and thus capacity. Recharging converts most lead sulphate back, and is deposited back on to the origin plate. It is only the plate separators that may guide the material back to the origin on the plate, but there are inaccuracies in placement, which tend to distort the plate and change the porosity of the plate, or total plate area available for the next chemical reaction during discharge. The reconversion is also typically incomplete, particularly when using voltage sense cut off chargers where the chemical conversion is sensed electrically rather than chemically. Meaning that the voltage at the terminal posts can be slightly different than at the far reaches of the plate, where lead sulphate conversion in not completed to exhaustion. The better voltage sense float chargers "sneak up" to final full charge voltage in order to allow all the chemicals time to complete conversion.
Completely draining a perfect battery would chemically coat the plate with non-conductive lead sulphate material. It is only the imperfections in battery construction that would allow any sort of partial recovery. But, it would certainly leave the plates in overall far worse condition than if it were simply recharged, rather than abused.
References:
http://en.wikipedia.org/wiki/Lead%E2%80%93acid_batteryhttp://www.vonwentzel.net/Battery/00.Glossary/
