I plan to get the BBS02 set with battery that goes on the frame to cycle to work in the winter and as we get temperatures as low as -15C here in Czech Republic I am worried about battery life getting drastically decreased, so I would like to keep it warm as much as possible.
There are some covers like https://www.e-bikeshop.co.uk/fahrer-bosch-battery-cover-ebike-2013-2014 however I think that might not be freeze proof enough, so I am thinking about some active solution.
Is there any thermophore(hot water bottle) system that would wrap around the battery or some electric mini pad heater that would use the USB port on the battery?
Or any other solution that you use, ideally DIY so it's also cost effective?
There are some covers like https://www.e-bikeshop.co.uk/fahrer-bosch-battery-cover-ebike-2013-2014 however I think that might not be freeze proof enough, so I am thinking about some active solution.
Is there any thermophore(hot water bottle) system that would wrap around the battery or some electric mini pad heater that would use the USB port on the battery?
Or any other solution that you use, ideally DIY so it's also cost effective?