For touring Motorcycles I am alway surprised that a bigger heavy duty battery is not fitted.
While in the summer the only extra load is the GPS, in Winter it’s a different matter.
Lights, Heated Waist Coat, Heated Grips, GPS, and lets not forget short journeys, all take a heavy load.
Many people including myself now consider a battery trickle charger an essential item.
If you are a Summer only biker then it’s a must but even for us Winter riders its necessary to top up the charge at the weekend to keep our bikes running well.