In winter I take them out. It only takes 6 minutes to charge on a basic battery charger. When in the bike I can ride for more than enough time to charge the battery and it is absolutely fine. I say, it, I have 3 of them. One in a K1300S with a 200 mile tank range. So it’s done some very long runs. If it wasn’t safe, it would not be allowed. Like everything else, if you buy a low quality one or don’t follow the instructions then you will more likely have problems
........If it wasn’t safe, it would not be allowed." Screwfix sells chainsaws, Gas boilers, angle grinders and lawn mowers. ... if you want a go? Just follow the instructions / guidance (laws?) from the person that designed it
...have you taken it apart and changed it's specification whilst maintaining it's CE approval status?
Why would I need to take it apart? Or change it’s spec I suppose if people are stupid enough not to follow instructions then that’s their problem. I don’t feel responsible for stupid people.