Without any breakthroughs in Li-ion technology between then and now, new batteries will do better if the original ones came from a "bad batch" and the new ones come from a "good batch".
There's a number of charge-discharge cycles they are rated for, those are typically guesstimated for "slow" charging, and fast-charging will reduce it. Possibly drastically. Reducing the drain by turning things off will reduce the number of charge-discharge cycles and extend their life -- in "wall clock" time, not in the number of charge cycles.
Physical size of the battery matters and you shouldn't expect miracles from a watch-sized one.
Sorry.