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Hi all. I had a post recently about my battery (18Ah) discharging when the bike was standing for a week or so. The battery indicators both in the display (LCD) and on the battery (LED) would jump from say 5 to 2, in one week without use. This happened three times in a period of one month, and...

Hi all. My 18Ah Kalkhoff battery suddenly started to discharge itself during periods when the bike is not in use (battery is left on bike). Within one week it can go from 5 bars / leds to 1, or from 4 to 1 blinking. It has not done this before. I am dismayed :(. Can I assume the battery is...

Hi all. I have installed a larger front chainwheel (42 instead of 35 teeth) on my Kalkoff Sahel. It has a spring loaded tensioner in the back, and this points straight down now, instead of slightly backwards. That is because the chain is 7 links too short now. Bike runs OK, but will there be...

Hi all. Just wanted to share some nice pics from Trondheim taken today. I took the Kalkhoff up to the Graakallen mountain above the city, some 5 km from where I live. It's tarmac almost all the way up, and then some hundred meters of gravel road. The incline is very steep. Cyclists use this as...

Hi all. I have a question about winter (long term) storage of my Kalkhoff 18Ah battery. The bike has been standing unused since october. How often (if at all) should I charge the battery during the winter? I charged it once in november, and now it again has only 3 of the 5 lights lit when I...

Hi all. My new Wisper 906 Alpino arrived yesterday. It was defective when I powered it up. Battery status is four green lights, however display on handlebars shows battery "Lo" symbol, and motor does not run. When I turn on the power the code "27" shows in the display, then the "Lo" symbol...

Hi all. I am new to this forum, and consider to buy a 2011 Wisper 906 Alpino. I have never owned or even tried an electric bicycle before, and would very much appreciate some info about the Wisper 906. I have a few questions, and hope that someone with first hand experience could be so kind...