New battery

The one in the foreground! My mobility scooter/nano-converted-Brompton is about 6 years old now, so not surprisingly it was in need of a new battery. The new one is much smaller and lighter, and a standard Bosch model, so replacements should be much easier to come by. However, TNSTAFL - the new one is 4Ah compared with 10AH capacity, so won't go nearly as far (so I have ordered a second one), there is no on/off switch of any kind (let alone one with key operation), and an adapter is required to connect to my old control system, and this is a very loose fit - it has already stopped connecting twice in less than 2 miles!