RANGE & BATTERY USAGE:
As a guesstimate (if your wondering
) based on my experiences to date, you may be able to achieve up to 28 miles in temps between 55-65F (no rain) with a weight limit up to 185lbs (including gear) without lights & without major hill elevation being the objective AND without excessive PAS levels and speed use on a freshly charged new-ish battery.
I like to be on my way home or within or around ~5 miles (8km) out when I see the battery indicator go from 3 to 2 bars. The further from home I am, the more frugal I become with the PAS often turning it off (PAS-0) and just using the throttle only when needed with PAS 1 (you can go a long ways this way but it is a work out). Keeping on eye on the power level output can really help gauge how much of the battery vs. human power is being used too. Another indicator the battery is on the low level: Generally it won't bring you up to 32km / 20mi per hour or show full power read out 500-500+ when on PAS 9.
The bottom half often goes quicker than the top (like a car gas tank).
The gentler the slope and closure to optimal battery operating temps the longer. I've gone 37 miles on a single charge and probably could have squeezed a few more out in prime conditions (ie. not using max speed/PAS 7-9).
I also think the range can be affected by partial use of the battery then stopping for (an) extended period(s) of time (ie. 8 hours for a work day) then using the remaining amount of battery. Normally my 32km (19mi) round trip bike ride (even in hilly terrain) would not be the bottom of the range but due to the delay midday it is. Though I may have to test this theory out to be sure this is the case. It is just a strong hunch at the moment though.
Best practices wise: I am unsure if it would be better for the battery to recharge/top off while at work or completely use the battery to the end and then recharge (there seems to be some indication that this might be better for battery longevity but does use up more of the battery cycles). That being said, it is really nice to not have to travel with the charger.