Originally Posted by
datlas
I know the battery is used. What I am wondering is if what happened today is typical for an old battery with Di2. I am willing to buy a new one if I know that will solve the problem.
I put a used system on my Propel and the battery performed similarly. I sprung for a new battery because mine was older and was missing some of the electronics like being able to integrate with my Garmin. My new battery does hold a charge longer but it still runs out quicker the second 50% than the first 50%.