[MENTION=388729]Marcus_Ti[/MENTION] thanks for that bit of info I have a newer, not new 5-port Junction A but since I started with Gen 1 Ultegra Di2, that Junction A didn't exist and you needed the SM-PCE1. Which charger allow USB connection to the Di2 Bus?

By the way, that Carlton Bale article is very old, he may have updated sections but it existed when you could still hack specific 10-speed Di2 into 11-speed Di2. (before Shimano plugged that hole)