I had a similar experience with a 400Wh Yamaha Battery when a connector pin where the charger connects to the battery sheared off.
The dealer I had bought the bike from had given me really superb customer service on all other issues I had with the bike, so it was a bit of a shock when I was told by them that they were not allowed to touch the battery and also had no facility to be able to send the battery away to get it repaired.
In my case both the plug that attached the charger to the battery was damaged and the sheared of connector pin at the battery.
The only option I was given by the dealer was to buy a new battery and charger which in the case of my smaller 400Wh Yamaha battery and charger is still a whopping £800 for the pair.
The dealer did say that I had nothing to lose repairing it myself.
As well as the money it just felt wrong to throw away a battery that was working faultlessly until the broken connector issues and likewise a perfectly good charger.
Anyway the good news is that I was able to repair the battery and charger myself and although I have only fitted a generic four way plug that I got off ebay for less than a fiver it is actually easier and more secure to use than the bespoke but flimsy Yamaha original.
I have a mate who is an ex BT engineer and we opened up the battery and soldiered the wires directly inside where they cannot be broken. Nothing dreadful happened when we opened the battery and it charged just as before when we put it back together.
I do use my bike to commute to work and back and agree that used in this way an electric bike can be a very green mode of transport but not if you cannot get perfectly serviceable items fixed.
This all happened back in April when the bike had covered 8932 miles since I bought it in March 2015. To be honest once you fix something you sort of forget about the hassle you had, but I have covered 784 miles since and the battery which is now nearly three and a half years old shows almost no signs of degradation since when it was new so it would have been a crying shame to have thrown it away. I am up to 9716 miles now.
The battery and BMS must be high quality to be working so well with the miles I have covered so it is doubly galling that Yamaha/Raleigh the importers cannot do simple repairs when they are needed.
My last ride to work was on Friday where 14 mainly off road miles to work used 28% of a full battery using lowest assist or off. 10 Miles road return used 33% of a full battery using lowest eco and middle standard to travel faster. 400Wh battery. Odometer now showing 9716 miles since purchasing the bike in March 2015.
I posted some pictures of this ride in Electric mountain bike forum/eMTB owners photo and ride thread.
As I have said above I cannot fault the dealer where I bought the bike, this is about Raleigh the importer and being able to repair simple faults. Makes a potentially very green mode of transport not very green at all!