Di2 battery finally down to 50%
#1
Yo
Thread Starter
Di2 battery finally down to 50%
Ive had my bike with di2 for 5 months. I ride 60 miles/week. It finally got down to 50% today. I could probably go another 3 months on it but I went ahead and put it on the charger mostly because I’ve never done it. So you di2 naysayers take note.
#3
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Yeah, they last a while with a single charge. Both of mine are 5 years old, and I've only been caught short once. I simply forgot to charge it. But if you ride more and in hills (more shifting), it will require more charging.
#4
Yo
Thread Starter
I have a question for you guys. Does the yellow light go out when it’s fully charged? And what is the other light for, the one with a battery symbol and an exclamation sign? My light went out in a little over an hour, was surprised it charged that quick.
#5
Farmer tan
#6
Senior Member
Those lights are charge indicators?!
I thought they told you when you needed a new bike.
I thought they told you when you needed a new bike.
#7
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#8
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I only get about 600 miles to a charge. That's with the new battery that you need for synchro shifting, etc.
#9
Woman make me faster
Charge mine twice a year if it needs it or not. I was told the D Fly would drain battery quicker but that has not been my experience. That synchro shifting doesn’t interest me and hearing about the battery life solidified that for me.
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I now charge mine once every month or two. My lights/cameras/PM get charged daily, so I setup a charging station in my garage where I store my bike. Makes it relatively easy.
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I'm shocked how much life everyone else gets out of theirs.
#12
Woman make me faster
I don't know the capacities on the two batteries, but I live in a very hilly place and shift a lot as a result. According to my Garmin, I make 200 - 300 rear shifts per hour of riding. (Multi-shifts count as several, shifting in the front gets you two rear shifts with it.) So it's probably not that the new battery is awful. At least don't take my experience as the norm.
I'm shocked how much life everyone else gets out of theirs.
I'm shocked how much life everyone else gets out of theirs.
#13
Chases Dogs for Sport
SF, I think you must lean your bike against a shift button when you put it away. I live in a mountainous area, too, and I get between 2,500 and 3,500 miles on a "half" charge. (I plug it in whenever I start to get the half charge indicator.) The generation of battery doesn't seem to impact this much.
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Sounds like maybe something is wrong with mine then. It can't be the wireless transmitter thing, can it? (That's how I know how often I shift, my Garmin counts for me.)
#15
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This was unexpected and not consistent with what others were saying at the time and are saying in this thread re discharge time. It had me similarly concerned and as suggested I thought I might have leaned the bike with the shift button depressed or that the FD was somehow actuating all the time.
Having been fully discharged and now on the second charge it has gone 400+ miles and is still >75%, solid green on the indicator. I believe that the Shimano batteries discharge quicker when new. At least that's what it seems like.
Given my experience I'd ask how many times you have charged and whether you have let it completely discharge (or get very low) prior to charging at least once? Might be worth trying.
-Tim-
Last edited by TimothyH; 11-02-17 at 10:13 AM.
#16
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On the first charge mine lasted 800 miles before it was at zero and the FD failed.
This was unexpected and not consistent with what others were saying at the time and are saying in this thread re discharge time. It had me similarly concerned and as suggested I thought I might have leaned the bike with the shift button depressed or that the FD was somehow actuating all the time.
Having been fully discharged and now on the second charge it has gone 400+ miles and is still >75%, solid green on the indicator. I believe that the Shimano batteries discharge quicker when new. At least that's what it seems like.
Given my experience I'd ask how many times you have charged and whether you have let it completely discharge (or get very low) prior to charging at least once? Might be worth trying.
-Tim-
This was unexpected and not consistent with what others were saying at the time and are saying in this thread re discharge time. It had me similarly concerned and as suggested I thought I might have leaned the bike with the shift button depressed or that the FD was somehow actuating all the time.
Having been fully discharged and now on the second charge it has gone 400+ miles and is still >75%, solid green on the indicator. I believe that the Shimano batteries discharge quicker when new. At least that's what it seems like.
Given my experience I'd ask how many times you have charged and whether you have let it completely discharge (or get very low) prior to charging at least once? Might be worth trying.
-Tim-
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Two wheels good. Four wheels bad.
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Two wheels good. Four wheels bad.
#17
Chases Dogs for Sport
I'm not sure about the impact the wireless transmitter might be having. I didn't like Synchro Shift, so I didn't leave my transmitter on the bike very long. It obviously uses SOME electricity -- I'm just not sure how much.
#19
Woman make me faster
If you are referring too the D-Fly it had very little effect on mine discharge wise. Not completely clear on how Synchro Shift works but i don’t have it and from what I have read that’s the only variable in our setup.
#22
Senior Member
I don't know the capacities on the two batteries, but I live in a very hilly place and shift a lot as a result. According to my Garmin, I make 200 - 300 rear shifts per hour of riding. (Multi-shifts count as several, shifting in the front gets you two rear shifts with it.) So it's probably not that the new battery is awful. At least don't take my experience as the norm.
I'm shocked how much life everyone else gets out of theirs.
I'm shocked how much life everyone else gets out of theirs.
I just set up a bike with an e-tap retrofit. I have to say, that's a really nice set up and I almost prefer it over the Shimano Di2 stuff.
J.
#23
Junior Member
My mileage dropped significantly when I switched to the new battery. My battery had very short life and serious issues taking a charge when I plugged the Shimano charger into a usb wall plug adapter from one of my tablets.
I had read somewhere using usb/wall plug adapters is problematic. Once I started plugging the charger back into my MacBook to charge I have not had any issues.
I had read somewhere using usb/wall plug adapters is problematic. Once I started plugging the charger back into my MacBook to charge I have not had any issues.
#24
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I also ride in a hilly area and make about that many shifts - which I found surprising. I had no idea I shifted that much. Your experience parallels mine. When I went to the new battery, I now get about 600 miles instead of around 1000. The reason I went to the new battery was to be able to fiddle with all the Di2 parameters with the e-tube software.
I just set up a bike with an e-tap retrofit. I have to say, that's a really nice set up and I almost prefer it over the Shimano Di2 stuff.
J.
I just set up a bike with an e-tap retrofit. I have to say, that's a really nice set up and I almost prefer it over the Shimano Di2 stuff.
J.
Thanks for sharing your experience, I guess that pretty much confirms it's the new battery after all.
#25
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I'd be happy to do it for science. I'm pretty convinced by what John had to say, but, still, let's find out.
I don't think synchronized shifting has that much to do with it, I don't shift in the front nearly as often, and it shouldn't be draining the battery when I'm not using it. But who knows. (I might turn that off, I have a love/hate relationship with it.)