Di2 recharging

[russ.will]

Okay, I expect this to be a minority concern but; how often do Di2 owners actually plug the damn thing in?

I've had mine 900 miles/5 months (it was an ex-demo unit and took about 15 minutes to charge/top-up when I received it) and have resolutely refused to plug it in since, if only to confound my nay-saying ride mates. Of course, they're all insistent that at some point I'll be left in some huge gear ratio because I have a battery.

Of course, having Di2, you change gear at even the slightest hint of a gradient, just for the fun of it, but It's got to the point where even I'm wondering. The battery warning light isn't on, but assuming Li-Ion charge profile; It'll be on for about 9sec before it dies, which isn't handy.

Your experiences please.

Russell

 

[Bollo]

I seem to remember reading somewhere Shimano-ey that you can expect around 1000km between charges, but the local up-and-down usually means I go about 600km before I get a low battery warning on my Garmin (I've got the D-Fly ANT+ unit because I'm a ponce). It charges up in no time though.

 

[derrick]

I charge it when i get a flashing green light, when i hold both buttons at the same time,

 

[huwsparky]

Charged mine on a 1000 miles for the first time.

 

[huwsparky]

I charge it when i get a flashing green light, when i hold both buttons at the same time,

Doesn't that mean that there's 50% left though? (I'm asking by the way as I'm not sure)

 

[derrick]

Doesn't that mean that there's 50% left though? (I'm asking by the way as I'm not sure)

Yep

 

[User33236]

I have a D-Fly too and charged by battery up ahead or riding from London to Paris (460km) last week. By the end of the ride the Di2 battery was still showing 90% on my Edge 1000!

 

[russ.will]

Cheers, for that. I had thought of the D-Fly simply because of the battery indication, but even for me it seems a bit much for that luxury.

Cheers,

Russell

 

[jefmcg]

I was told by a mechanic that on LEL (1400km) a cyclist with Di2 had a flat battery, but that it hadn't been charged recently

 

[Winnershsaint]

I've charged mine a couple of times since September. No though or planning. Just seemed like a good idea at the time. One was prior to an event, more by luck than judgement.

 

[User269]

Haven't used mine enough yet to offer any valid experience, but remember you can check your battery charge at any time, and the indications are;
Solid green 75-100%
Flashing green 50-75%
Red 25-50%
Flashing red Dead!

 

[steveindenmark]

I know it can go for ages without charging. But I plug mine in overnight about once a month. It keeps it topped up.

 

[marknotgeorge]

Li-Ion batteries don't much like being run right down as it shortens the battery's life. Topping it up every now and again when convenient would seem sensible.

 

[Sbudge]

I've both an external and an internal di2 bike. The internal needed a charge at 1000km (I do plenty of hilly rides so tend to change gear a lot) the externally equipped bike lasted nearly 1500km before needing a charge. Remember if you've D-Fly, a decent Garmin and Dura-Ace shifters you can use the hidden switches in the hood to switch screens, trigger timer etc etc.

 

[Vertego]

Haven't used mine enough yet to offer any valid experience, but remember you can check your battery charge at any time, and the indications are;
Solid green 75-100%
Flashing green 50-75%
Red 25-50%
Flashing red Dead!

You forgot one...

No light at all = really dead!