Depends on how long it’s been that low. Given the battery is relatively new if you could borrow a smart charger it would be worth giving it a go. Charge until it shows the battery is charged, disconnect, leave a couple of hours then measure battery voltage and remeasure for the next few days. If it’s holding voltage it might be saved. But the proof of the pudding will be when you go to move it on the mover.I have a relatively new (less than 2 years) but dead (less that 10v) leisure battery. Some of the modern, 'smart' chargers claim to be able to recharge and bring back to life a dead battery. Does anybody know if they really do?
Now that you have it breathing on its own again, I would recommend adding a CTEK to your armoury and recondition the battery with it. Hopefiully get rid of the sulphation thats likely to be on the plates.Thanks for all the feedback. I put it on a long charge with a conventional charger and it does seem to have come back to life and is holding charge.