I have a Bosch BCS210 4 amp charger on a Bosch BBS276 500W battery (Cube Bike BTW) and this thing gets VERY HOT when it is first connected and pushing to get the battery up. I am talking about a 5 bar display on the battery down to maybe 3 bars. There is no fan for the charger. I called the dealer where I bought the bike and he said it was "normal" for those chargers to get hot. I think this is not normal, so I am wondering if any of you here have the same situation as described and can comment on the heat? I am thinking I should also email Bosch directly about it to ask? I can't imagine how hot this charger would get if the battery was down to 1 bar ????