Does this bike exist?

[Crankin]

Eden, it's not a big deal according to DH. I think he only recharges it a few times a year, and he rides about 3k a year. If you don't keep tabs on it, there's a yellow warning light and it puts the bike into a low gear, so you can get up hills without having to shift. I didn't get it because I thought the extra money was frivolous, but he says it eliminates any having to mess around with fixing temperamental shifting. My Ultegra is perfect, so it's just not an issue.

[emily_in_nc]

Yes, from what I read about Di2, there is plenty of warning, and even once the low battery warning comes on, you have 500 miles in reserve! I'm pretty fastidious about charging my electronics, so for me, I don't think that would be an issue. As Crankin says, and as I read, the battery life is crazy long. Still, not a bad idea to take a backup battery on every ride, just in case.

After breaking a shifter cable on one of our long rides and having to limp back to the hotel for 40 some miles in a single-speed mode, I can see the virtues of Di2. Among others, this article by a female triathlete made me lust after it:

http://angelanaeth.com/once-you-go-di2/