well i only had time for one and a half hours on the bike i lost about a quarter of battery on the bar that shows how much charge is there. the mapping worked really well. the brightness was set to dimmest possible. i know for certain the newest phone upgrade is affecting battery because i charge phone completely each evening then take it off charger and have it near the bed at night and since the newest upgrade my phone is loosing charge at night. used to be a full in the morning and now it is slightly less than full. that or my cats have been playing games on my phone at night.