I just "splurged" and bought a Chinese e-bike - I am back in China. It was only about US$250, so I don't expect high quality, cutting edge stuff, but I do have a couple of questions that will help me become more knowledgeable about ebikes. I charged the battery last Wednesday but didn't use the bike until the following Sunday. When I did, I found that the battery was dead. The battery is (supposed to be) a lithium ion battery, 48v, 12 amp pack. It is a light pack - I would guess 10 pounds-ish. It is easy to carry up the 3 flights of stairs to my apartment.
My question: why would the battery pack discharge so quickly? The people in the shop told me that "that's the way it is" but that does not coincide with my meager knowledge of this kind of battery. It is mostly academic at this point, unless the problem indicates that there might be a short or improper grounding. Any thoughts?