Charging the battery off the bike, difference in battery duration?

[TechMan]

Hi!

I charged the battery to 100% while the battery was in the bike, and after that, I rode to work, which was 50 km (31 mile) trip. I had 12% battery left. Then, I took the battery off the bike and charged it. When I got home, I had 37% left, even when I had rode similarly at same speed as the other way. I wonder, if the bike has some kind of control system to limit the charge voltage and protect the battery, and that protection system is not there when the battery is charged separately. Anyone had similar experiences?

 

[harryS]

Same charger at home and work? Uphill to work and downhill coming home? Steady wind?

Do it again. Charge it off the bike this weekend, and see if you get over 30% going to work on Monday.

Now it could be that the bike has a little load on the battery, like a light was left on overnite, or maybe there's some current load even with everything turned off.

 

[Ravi Kempaiah]

Hi!

I charged the battery to 100% while the battery was in the bike, and after that, I rode to work, which was 50 km (31 mile) trip. I had 12% battery left. Then, I took the battery off the bike and charged it. When I got home, I had 37% left, even when I had rode similarly at same speed as the other way. I wonder, if the bike has some kind of control system to limit the charge voltage and protect the battery, and that protection system is not there when the battery is charged separately. Anyone had similar experiences?

I would guess it has more to do with the temperature if all other factors were equal. The charging irrespective of how its done, is controlled by the voltage at the charger end and shouldn't change the battery capacity.