My bike has a Varta 12ah battery on it, although I'm a bit shocked it's 6yrs old, I thought it was more recent than that!
Bike is used at least 5 days a week all year round. I don't trickle charge it, but will give it a manual charge once or twice a year normally when the temperature really drops.
I also have 10w spotlights & heated grips
Battery readings:
Ignition off - 12.77v
Ignition on - H/L on - 12.56v
Ignition on - H/L and S/L on - 12.50v
Ignition on - H/L, S/L & H/G on - 12.30v
Engine on tickover - everything off - 14.37v
Engine revved - everything off - 14.38v
Engine on tickover - H/L on - 12.40v
Engine on tickover - H/L & S/L on - 12.35v
Engine on tickover - H/L, S/L & H/G on - 12.24v
Engine on tickover - H/G on - 14.26v
Engine revved - H/L on - 14.08v
Engine revved - H/L & S/L on 14.07v
Engine revved - H/L, S/L & H/G on - 14.01v
Engine revved - H/G on - 14.31v
Obviously this is my bike, my battery, etc, but the readings are a good guideline if you suspect any battery issues
