Many questions are surfacing about diodes.
Regarding a 0.95 volt diode... Well, as far as I know there is one Schottky diode made that has a 0.98 VF, IF=160amps, it is a TO-249AA package. It measures about 2"x1"... For example, a standard TO-220 package is about 1/5 the size of the 249AA
This diode costs around $65 USD....and they are not easy to get. It is made by IR for those might be interested.
If anyone is interested in them I do have about 25 of them in my lab.
The majority of the high speed diodes fall in VF range of 0.25v to 0.8+
Diodes have also leakage current but is minimal for this application...
what's the diff. between a diode and a transistor?
A transistor is nothing more than two diodes wired together...well it gets a bit more complicated but that is the basic way is made. A model of a transistor is two diodes wired together. Thus you have three connections, the BASE, COLLECTOR, and EMITTER. The BASE is at the junction of the two diodes. The BASE is used to control the current flow through a transistor.
A diode is like a ONE WAY VALVE, it allows current to flow in one direction (IF)... a transistor is a CURRENT AMPLIFIER, and an FET is a VOLTAGE amplifier. This is in the most elementary form.
Depending how you connect a transistor (or FET) you can control the way they operate. A diode has two states, ON-OFF.
The current that flows through a TRANSISTOR is equals to Ie=Ic+Ib ... that means that the current that flows through the EMITTER (Ie) is equals to the total of the COLLECTOR (Ic) and BASE (Ib) CURRENT (again,in it's simple form)
A diode passes the current (when FORWARD BIASED) that the load demands... you should not exceed the current and power limits of the diode, or else... BOOM
Another important thing to consider is that if you are discharging EACH CELL individually you do not have to worry about the 0.9 volt cut-off.
There is NO RULE that states that a cell should be discharged to 0.9 volts. This is just a safe voltage that is used when cells are put together in series in order to avoid what is known as VOLTAGE REVERSAL.
There is NO difference whatsoever if you bring a cell down to 0.9 pr 0.85volts... 5 millivolts is NOTHING.
The main thing when discharging a cell is to keep it within a safe operational range and that includes the voltage and current.
For good equalization, the lower the current the better the equalization. You just need to decide at what voltage you want to equalize your cells at and make sure that all of them cut-off at the same voltage.
I do NOT RECOMMEND discharging cells at high current (above 20 amps) because of the temperature and inner cell pressure that is reached. If you want your cells to last longer discharge them at a lower current.
The other thing that you need to consider when selecting and using diodes to control cut-off voltages is thermal drift. If the temp of diodes increases it will change its characteristics...
I hope this helps