I've built my bike about 3 years ago and installed a 52 volt (20 ah?) super shark battery. I've only ridden the bike maybe a dozen times since the conversion, but now I am having a problem with the battery. It does not seem to be holding a charge. When I go to charge the battery, it gives/shows me three green lights with the last one being red. The charger seems to be working, but i can't seem to get that last red light to go off. After charging the battery (yes, red light is still on), I can turn on the display and everything seems to be working fine. But in a day or two, the battery is 'dead' and the ebike is once again just a bike.

I've done some online research and suspect I need to reset the battery - but I'm not sure how to go about doing this. It has been a great ebike up until this latest problem. Has anybody else run into this problem? Any hacks or other things to try?