CopperCyclist
Veteran
Just had to charge my Di2 battery for the first time today too. Well, I should correct that, I didn't "have to", but the indicator finally said its below 50% charge so I decided I would, as reading up it suggests the best way to extend these batteries is to charge up from 50% or above each time. I'm fairly happy with it as its after 600 miles, with a lot of commuting (i.e. loads of front mech changing) involved. What battery life to miles are others getting out of interest?