winter

Is there any benefit for modern (I have a 2019 Bonnie) bikes/batteries in using a battery optimizer? If so when? Storage exceeding a certain number of weeks? Cold weather? Appreciate any guidance!

Has anyone got any suggestions for handy accessories for the Striple R? I've recently moved back to the UK and the cold is hitting me hard. I'm looking at potentially getting a windscreen, handguard and some heated grips?? Any ideas? Thanks