The Pogo Pro battery charges in 3 hours and will operate your pogo mop for 2 hours.
Batteries do drop by a few volts over the run time so the oscillation does slow down a little as the battery gets closer to being depleted. However a Pogo with only one battery bar will still work great on most surfaces.
However the higher RPMs of a fully charged battery do make a noticeable difference when working on many carpets. When a customer intends to use the Pogo on carpet, they would be better off buying a Turbo and an orange battery.
The battery factory only warranties them for one year however my experience indicates they will normally last for more than five years in home use.