I've done 50km yesterday, with my girlfriend at the back with 2 partial recharges, so I finished a ride with 9 bars left. It was a sunny day with 25+'C.
At the last 500meters of ride, the battery and temperature telltales lit up and BATHOT appeared.
Battery fans work, when I plug in for a recharge. Why won't they work and cool the battery when riding? BATHOT would never happen if the battery fans would work during the ride, when the batteries are above, let's say, 40 degrees Celsius?