Di2 charge question
sigorman85
Posts: 2,536
Can I leave the di2 charging all night ? Has it got a auto cut off ie stops charging or will I do the battery in if I leave it on all night?
When i die I just hope the wife doesn't sell my stuff for what I told her I paid for it other wise someone will be getting a mega deal!!!
De rosa superking 888 di2
De rosa superking 888 di2
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Safe to leave it. It'll charge to full then stop with no danger of overcharging or doing damage. Japanese electronics are good at this sort of thing.0
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Brilliant cheers thanks for your helpWhen i die I just hope the wife doesn't sell my stuff for what I told her I paid for it other wise someone will be getting a mega deal!!!
De rosa superking 888 di20 -
It takes about 30-45minutes to fully charge so why overnight?“Give a man a fish and feed him for a day. Teach a man to fish and feed him for a lifetime. Teach a man to cycle and he will realize fishing is stupid and boring”
Desmond Tutu0 -
Put it on charge at 12:45 so would have been asleep with in 45 minsWhen i die I just hope the wife doesn't sell my stuff for what I told her I paid for it other wise someone will be getting a mega deal!!!
De rosa superking 888 di20 -
One tip I picked up from Shimano; don't charge your internal battery direct from the mains (i.e. through a normal USB transformer). It doesn't work properly.
I was leaving it like that overnight, and it only showed a 1/2 charge in the morning, and it was on flashing red after 2 hours riding. Couldn't work it out, each try would not top up the battery.
Shimano said NOT to charge direct from mains but through a computer USB port. I was sceptical, but tried it, and it worked, full 100% charge.
No idea what the difference is, but something to bear in mind.0 -
Really? Not doubting you, but I'm struggling to see why that would be unless there's something very clever in the etube USB driver. I've recently charged both my 9070 bikes from the mains (using a random tablet charger); both have been ridden since, both show full charge. In principle charge control for di2 is a function of the electronics in the battery, not the charger (the light on the charger goes out not when the charger thinks the battery is full, but when the battery thinks it is and so stops drawing current). The only difference between a PC USB port and a charger is amperage - nominal USB is 0.5A, tablet chargers can be 2.1A (iPhone chargers are 1A). Lots of laptops now have higher-output USB ports because people use them to charge their phones. Amperage determines charge time (some tablet chargers, e.g. Asus & Lenovo, also support higher voltage than the nominal USB 5v, so as to deliver more watts for the same current, but the Shimano battery will still only draw at 5v AFAIK). Some interesting stuff here: http://www.digikey.co.uk/en/articles/te ... y-chargingbernithebiker wrote:One tip I picked up from Shimano; don't charge your internal battery direct from the mains (i.e. through a normal USB transformer). It doesn't work properly.
I was leaving it like that overnight, and it only showed a 1/2 charge in the morning, and it was on flashing red after 2 hours riding. Couldn't work it out, each try would not top up the battery.
Shimano said NOT to charge direct from mains but through a computer USB port. I was sceptical, but tried it, and it worked, full 100% charge.
No idea what the difference is, but something to bear in mind.0 -
964Cup wrote:
Really? Not doubting you, but I'm struggling to see why that would be unless there's something very clever in the etube USB driver. I've recently charged both my 9070 bikes from the mains (using a random tablet charger); both have been ridden since, both show full charge. In principle charge control for di2 is a function of the electronics in the battery, not the charger (the light on the charger goes out not when the charger thinks the battery is full, but when the battery thinks it is and so stops drawing current). The only difference between a PC USB port and a charger is amperage - nominal USB is 0.5A, tablet chargers can be 2.1A (iPhone chargers are 1A). Lots of laptops now have higher-output USB ports because people use them to charge their phones. Amperage determines charge time (some tablet chargers, e.g. Asus & Lenovo, also support higher voltage than the nominal USB 5v, so as to deliver more watts for the same current, but the Shimano battery will still only draw at 5v AFAIK). Some interesting stuff here: http://www.digikey.co.uk/en/articles/te ... y-chargingbernithebiker wrote:One tip I picked up from Shimano; don't charge your internal battery direct from the mains (i.e. through a normal USB transformer). It doesn't work properly.
I was leaving it like that overnight, and it only showed a 1/2 charge in the morning, and it was on flashing red after 2 hours riding. Couldn't work it out, each try would not top up the battery.
Shimano said NOT to charge direct from mains but through a computer USB port. I was sceptical, but tried it, and it worked, full 100% charge.
No idea what the difference is, but something to bear in mind.
I know, and that's exactly what I thought - a USB port is a USB port, right?
But I could not for the life of me get the internal (9070) battery full, and I was considering buying a new one.
On my call to Shimano, they instantly asked how I was charging it. When I told them, they said don't do it like that, do it via a computer, and this fixed the problem instantly.
Perhaps it's the transformer that makes a difference? I was using a Garmin Switching Power Supply one...?0 -
Can't see how the PSU makes a difference when there's a bespoke charger between it and the battery. The only explanations I can come up with are either that the USB driver for the internal battery charger actively manages it in some way during charging (i.e. when etubeproject itself is not running) or that the charger is too dumb effectively to manage anything *other* than a stock 0.5A input. Both seem pretty unlikely to me.bernithebiker wrote:
I know, and that's exactly what I thought - a USB port is a USB port, right?
But I could not for the life of me get the internal (9070) battery full, and I was considering buying a new one.
On my call to Shimano, they instantly asked how I was charging it. When I told them, they said don't do it like that, do it via a computer, and this fixed the problem instantly.
Perhaps it's the transformer that makes a difference? I was using a Garmin Switching Power Supply one...?
Still find it quite weird to be plugging my bike into a laptop in the first place - thought I'd left all that behind when I stopped racing cars. Don't get me wrong, I still love di2, but I have recently gone back to riding mechanical from time to time. It's only boggo Veloce on a posy Italian artisanal steel frame, but there's something 'right' about it. That bike has no power meter, cadence or speed sensor either, so riding it is more like fun and less like 'training'. It also weighs about 4kg more than my best bike, so it's probably actually better training despite the lack of data.0 -
I presume that relates to a normal USB charger, and not Shimano's own Di2 mains charger?bernithebiker wrote:One tip I picked up from Shimano; don't charge your internal battery direct from the mains (i.e. through a normal USB transformer). It doesn't work properly.0 -
CiB wrote:
I presume that relates to a normal USB charger, and not Shimano's own Di2 mains charger?bernithebiker wrote:One tip I picked up from Shimano; don't charge your internal battery direct from the mains (i.e. through a normal USB transformer). It doesn't work properly.
Yes. I just used any old mains USB charger (in this case it was a (presumably good quality) Garmin one.
My 9070 did not come with any mains charger as such. The charging unit just terminates in a USB lead.0 -
My di2 charges fine with the shimano power lead and supply unit givenWhen i die I just hope the wife doesn't sell my stuff for what I told her I paid for it other wise someone will be getting a mega deal!!!
De rosa superking 888 di20 -
I guess all of this relates to internal batteries? I have external on both of my Di2 bikes and on the rare occasions I need to charge them on the bespoke charger it's stupidly quick.ROAD < Scott Foil HMX Di2, Volagi Liscio Di2, Jamis Renegade Elite Di2, Cube Reaction Race > ROUGH0
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meanredspider wrote:I guess all of this relates to internal batteries? I have external on both of my Di2 bikes and on the rare occasions I need to charge them on the bespoke charger it's stupidly quick.
Yes, internal here.
Thing is, Shimano don't supply you with a plug in charger as such. It's just a transformer/PSU with a USB on the end. So you're free to choose where you plug in that USB.0 -
Yup - you only need to try charging an iPad from any generic USB charger to know that they aren't all created equal. Same thing with my bike light - it never reached full charge on one charger.
Personally, whilst for aesthetic reasons I did consider getting an internal battery, I'm glad I didn't bother.ROAD < Scott Foil HMX Di2, Volagi Liscio Di2, Jamis Renegade Elite Di2, Cube Reaction Race > ROUGH0 -
CiB wrote:
I presume that relates to a normal USB charger, and not Shimano's own Di2 mains charger?bernithebiker wrote:One tip I picked up from Shimano; don't charge your internal battery direct from the mains (i.e. through a normal USB transformer). It doesn't work properly.
You can't charge an internal pencil battery using the Shimano mains charger. You can only charge it using the USB charger via the port in the control box under the stem or wherever you stick it.0 -
Sure, but the issue here is how you supply power to the SM-BCR2; Berni is suggesting that if you power it from a laptop this gives a different result to powering it from a generic USB transformer such as an Apple iPad/iPhone charger. I'm saying I can't see how this would matter given that the BCR2 will have charge management electronics inside, so surely all the USB port is doing from that perspective is supplying +5v at 0.5A nominal (technically 5 x 100mA 'loads').Rodrego Hernandez wrote:CiB wrote:
I presume that relates to a normal USB charger, and not Shimano's own Di2 mains charger?bernithebiker wrote:One tip I picked up from Shimano; don't charge your internal battery direct from the mains (i.e. through a normal USB transformer). It doesn't work properly.
You can't charge an internal pencil battery using the Shimano mains charger. You can only charge it using the USB charger via the port in the control box under the stem or wherever you stick it.0 -
All I wanted to no is if I could leave it on charge over night ..........When i die I just hope the wife doesn't sell my stuff for what I told her I paid for it other wise someone will be getting a mega deal!!!
De rosa superking 888 di20 -
sigorman85 wrote:All I wanted to no is if I could leave it on charge over night ..........
Yes, you can. The light on the charger is on when it's charging and off when it isn't. Plug it into whatever you can.0 -
Cheers shall I close this before it gets nasty?When i die I just hope the wife doesn't sell my stuff for what I told her I paid for it other wise someone will be getting a mega deal!!!
De rosa superking 888 di20 -
Hi guys.
Bit of a post resurrection here.
I have had trouble with my Di2 not charging too. It completely died on me about 4 weeks ago. I tried charging it through my supplied USB cable and an IPhone plug as I had twice previously. Still nothing. Not even a flashing red light or anything.
I've eventually got round to having a looking at fixing it (busy life). I've plugged it directly into my computer and hey presto. Fully charged.
Not sure why it doesn't like being charged by a plug, but there you go. It's the ultegra 11 speed Di2 FYI0 -
Alugenius wrote:Hi guys.
Bit of a post resurrection here.
I have had trouble with my Di2 not charging too. It completely died on me about 4 weeks ago. I tried charging it through my supplied USB cable and an IPhone plug as I had twice previously. Still nothing. Not even a flashing red light or anything.
I've eventually got round to having a looking at fixing it (busy life). I've plugged it directly into my computer and hey presto. Fully charged.
Not sure why it doesn't like being charged by a plug, but there you go. It's the ultegra 11 speed Di2 FYI
You can thank me later.....0 -
This discussion is really old but I thought I would weigh in. The internal battery charger requires a 1 Amp USB adapter. Most USB adapters are .5 Amps and are not beefy enough to fully charge the battery. This is plainly stated in the Shimano document DM-R8050-02-ENGDi2
From the section on SM-BCR2: Battery charger for SM-BTR2/BT-DN110• Use an AC adapter with a USB port with a voltage of 5.0Vdc and with a current equal to or higher than 1.0Adc. If the one with a current lower than 1.0Adc is used, a charge error may occur or the AC adapter may heat up, leading to a fire.
• Do not use a USB hub when connecting the cable to a computer USB port. This may cause a charging error or re due to overheating.
• Be careful not to damage the charging cable. (Do not damage, process, let near hot objects, bend, twist or pull them; do not place heavy objects on top or bundle them tightly.) If they are used while damaged, re, electric shocks or short-circuits may occur."0
