I have just disposed of my share in (and Trustee status of) an aircraft after 22 years; we had the above named battery for many years but the last one never held charge after about 18 months.
Our maintenance organisation has a room full of them, all less than three years old and will only fit Concorde batteries now, having had a host of warranty battles (many unsuccessful) with the battery maker under discussion.
Meanwhile Concorde has a new system for preventing the plates warping and thus shorting out I believe, which our people recommend.