Has my Di2 battery died?

[TyrannosauRoss Lex]

Edit - ignore - swapped it for a different USB plug and the light is now solid. Original post:

I have the bluetooth kit thing so when my Garmin said the Di2 battery was on 30% I put it on charge. Due to going away I didn't use the bike but went to try it today and Di2 dead. Nothing. I thought "hmmm, maybe I didn't put it on charge" so I put it on charge and noticed the plug/adapter orange light was flashing, I swear it usually stays a solid orange when charging and then no light when charged.

Came back a couple of hours later and noticed the charge light had gone off, left it plugged in and checked the buttons and hey presto, I had gear selection. However, I turned on my Garmin and it's reporting the Di2 battery at 30%. I put it back on charge and again, the charge light is flashing.

Whilst plugged in if I hold a shift button down the green light flashes relatively quickly 5 times, then both red and green light flash simultaneously, a little slower, 3 times.

Any thoughts?!

Bike was new in 2018.

Edited by TyrannosauRoss Lex on Tuesday 1st June 20:45

[louiebaby]

Mine seems a bit temperamental when plugging it in to charge. It seems to like being plugged into a powerbank though, which is kind of handy, as I don't have to bring it in to charge it!

[Soft Top]

Mine can be temperamental if it gets down low after winter. It will then charge and shows fine but drops to nothing by my next ride. I just have to go through this a couple of times then all is good for summer. I suspect winter cold affects it, (haven't tried it recently with all the poor weather so might be gone again)!