Ok so it's not a large stationary storage battery but it is a lithium battery and I think it puts into perspective how incredible lithium battery chemistry is.
My example cell is a 3.7v 5.2whr 1420mah IPhone 4 cell. This cell has been sized to give the phone a full days Average use and charged at the end of each day. How intensive that use is will determine the DOD each night before recharging. I would say personally on average the DOD is around 50% though can be 25 - 90% DOD.
This gives a reasonably high discharge rate when you take the cell size into account. The same can be said for the recharge rate .75A so roughly 0.5C.
I have had this phone from 2010 it's now late 2016. So the battery is now 6 years old. The cell inside has now had 2125 or more cycles on it. I would say the cell is treated harsh in comparison to a stationary large storage cell. The phone is full of hot electronics that are more or less pressing on the cell and the phone is often subject to hot conditions in cars and outside.
So yesterday I did a full DOD cycle test on the cell. The results were 1248mah 12% capacity loss in 6 years and 2125 cycles.
Edit: I had to order a new screen for this phone after my wife almost dropped it over the Hoover dam wall last year (well dropped it on the concrete path at the top of it
) So when ordering the new screen I also ordered a new OEM battery as well $16. So I plan on installing the new cell in the phone for a day and test it's capacity for comparison and will report back. Though I don't expect it to be more than 1420mah printed on it.
Offgrid 2008, Selectronic PS1 6kw/48v inverter, x 2 Midnite solar classic 150 MPPT, 3960w NE PV 24 x 165w BP panels, 4200w NW PV 21 x 200w DAQO PV, 16x400ah lithium.