On Wednesday, October 3, 2018 at 9:10:35 AM UTC-5, ixiz wrote:
On Wednesday, October 3, 2018 at 10:05:45 AM UTC-4, sms wrote:
On 10/3/2018 4:51 AM, ixiz wrote:
I’m not certain hence the question. I do know there are electronics in the battery that uses canbus for communication to other components

The CANBUS data is modulated on the power lines, but I doubt if the
battery has a CANBUS controller inside it.

I dont know much bout electronics - hence the confirmation before i damage anything

I just want to be able to have a charged internal di2 battery when i need it as a loaner or help someone that needs it when as needed - I dont have the new 6880 nor the 8050 system - i have a 6770 (10s) external battery

I really don't think its worth your trouble to even investigate this topic. My 7970 Di2 battery lasts 2-3 YEARS before needing recharge. And when a recharge is necessary, it turns off the front derailleur shifting first, you can still use the rear shifter for many, many miles. Eventually both derailleurs would stop working I suppose. Having a dead Di2 battery is about as common as having a lunar and solar eclipse in a month with two full moons. And Christmas, New Years and Thanksgiving all falling in the same month too.