Went to use my 2019 1250 gsa today after a lay up of about 6 or seven weeks attached to its motorrad trickle charger. initially it started after a couple of attempts then wouldn't start 10 mins later. TFT says low battery. I know that there have been issues with batteries on these bikes and it has played up on several occasions previously. What make of battery have you chaps used as a replacement? I'm after a straight forward swap. I've been on the nippy normans site but their sold out of odessey items. Confused now!