Hey everyone,
Pretty sure this has been discussed before and if I remember correctly, was already on the podcast a while ago:
Is there anything smaller to charge my di2 on a longer bikepacking trip?
Ideally a usb c adapter, but also a small cable would be fine. It just has to be reliable, otherwise there is no point in taking it with me.
(First post, let me know if I should specify, move to other category, …)
Thanks 
There are little USB C to 12 speed DI2 chargers for pretty cheap. I keep one in my saddle bag just in case.
11 speeds DI2 is not really any options. I did get a third party one off of Aliexpress that’s a bit smaller to leave in my car as an emergency back up but it’s not that much smaller than the Shimano one.
I’m not sure what to do with the new wireless battery.
Thanks Blair!
Given that there are so many rubbish solutions, could you be so kind and provide me with the pecific brand name for the reliable adapter?
It was the first one that came up on Amazon 
I think those are really all the same. I can’t say if one is better than another.
Rrskit is the one that gets recommended on chinertown forum and it’s the one I have. Some of the cheaper versions are supposedly 3D printed and fragile.
Not sure if the forum allows links - this is a straight link to the item on AliExpress not some affiliate referral spam.
Obviously it works with any USB-C wire so I just use the one I have for my phone
I’ve seen them on Ali Express — usb c to Shimano di2 charge port plugs, never used one. On trips I take my Shimano cable and Assioma plugs and I have a big battery pack that I use to supply recharge juice if needed. But I’m not a bike packing guy. Usually I’m staying in a hotel and going on a race or scenic day ride sort of thing so I can recharge stuff in the hotel.
I have one of those as an emergency backup, but iirc @GPLama has had bad luck with them - as in derailleur breaking bad luck due to the mechanical interface between the charger and the port on the derailleur.
Shortening a legit Di2 cable would not be a super difficult task if you’re comfortable with splicing tiny cables. One of my Covid hobbies was building usb cables (don’t ask) - it’s easier than you’d think with the proper tools.
I’ve used one of the Aliexpress ones with no problems, much better than a dedicated cable as you’ll have a USB C cable for charging anyway
Thanks everyone, what a great community!
I’ll give the AliExpress ones a try 
I keep a very small USB battery in my bag with a USB C, mini, and lightning cable along with the DI2 plug. I’ve never had to use them on the trail but it’s more there for peace of mind in case the deraileur or radar run out mid ride.
How long is your bike packing trip? A DI2 battery does last a long time.
