Battery life is a function of number of cycles, depth of cycle, operating temperature, storage temperature, and calendar time.
Spacecraft designers and operators that apply the lithium chemistries, especially those that operate in low orbits which cycle every 90 minutes or so, 24/7 severely limit the depth of cycle. Considering that a planned 4 year life involves over 23,000 cycles, they are understandably very conservative concerning battery operation. They would prefers to keep the charge state between 40% and 80% at all times and are extremely adverse to allowing the charge of these batteries to drop below 40%. This limitation has obvious limitations on battery performance, lowering the usable energy to mass to only 40% of the advertised energy to mass. There is active research on chemistries to decrease the cycle life sensitivity to depth of cycle. So maybe the space program will actually generate a useful spin-off for us!
So what does this mean for us? If we generally treat our batteries well (moderate storage charge, room temp storage and operation etc.) but fully charge and discharge for those record breaking flights, we can expect to see significant degradation by 50 cycles or so (say from full down to <10%). On the other hand if we are completely battery-****, only charging to 80% and landing by 40% for those 10 or 12 minute hops, the battery will be going strong after well over a hundred, perhaps many hundreds, assuming that there were no manufacturing defects.