[Closed] Charging Di2, abroad, via USB, without a computer

Charge all sorts with the iPhone charger, no reason why it shouldn't be fine

Although I also have a travel adaptor with a 500mA USB port on top

You'll be fine, standard USB is 500mA. With things like the iPad charger other devices will only draw the charge they need so that's fine for the iPhone and anything else.

Depending how much charge it needs one of the portable phone batteries might be more suitable and means you can charge without any electricity at all if required.

http://www.amazon.co.uk/dp/B00BQ5KHJW/ref=sr_ph?ie=UTF8&qid=1429880220&sr=1&keywords=anker

Yep, standard USB 'phone charger' type plug will be fine.
However they do appear to come in two different power ratings as my old phone charger doesn't charge my daughters new tablet..

Suggest you check at home first, just to be sure.

Even if your power adaptor is only rated at the lower 500 mA, it should still charge the battery, just take longer to get to full charge.

It'll be fine - charge voltage will be correct, mA/h rating just determines how long it takes to charge it.

Cheers everyone.

Could I use the same plug to charge my USB Exposure light too?

If so thats very good news.

I've used my iPhone plug to charge my Di2 (amongst other things) with no problems.

Quick bump for this one...

So what's the point of the 60 quid Shimano charger then if I can just use any old USB charger?

So what's the point of the 60 quid Shimano charger then if I can just use any old USB charger?

Could be wrong but its that £60 charger people are plugging into a standard USB plug. You cant pulg a USB cable into Di2, it needs its own wire and the £60 one is that (and it also provides the bits needed to program the shifters, hence cost).

Ah right, I see, so it's USB to the charging box, then some proprietary connector form that box to the junction box?

Spot on. I've used Apple charger on mine with no issues.

Thanks. Bit of a pain that they couldn't just stick an USB socket on the junction box. And I've already got a bike with the external battery so I'm going to have two chargers now 😕

Hear reports that you can just charge via the rear mech. How do people do this? Do they just have a spare B junction box, unplug the rear mech, and plug the cable into the junction box which has the charger socket? My junction boxes may not be easily accessible so be good to know if I can do this.

I've used my Dynamo and Luxos U Light.

Thanks. Dynamo not really appropriate for my intended build 😉