sammyd173 Posted September 27, 2019 Report Share Posted September 27, 2019 Hello! Just got a 2012/ 2013 20.0. Previous owner said the batteries are new. When I charge the bike the fan continually cycles up and down i.e. speeds then slows. Anyone know what this might mean? Seems to happen after the bike has been on the charger for 20 mins or so. I'm aware not to charege for more than 5 hours. Thank you! Quote Link to comment Share on other sites More sharing options...
peterh Posted September 28, 2019 Report Share Posted September 28, 2019 Normal, if batteries are coming close to full charge, just before the green light on charger comes on to show full charge. Quote Link to comment Share on other sites More sharing options...
scifi Posted October 1, 2019 Report Share Posted October 1, 2019 It's probably because of the heat generated in the Power Supply. Not enough to cause the fan to be fully on, but too much to be without the fan. The heat sink will take time to heat up and cool down. Quote Link to comment Share on other sites More sharing options...
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