Hello forum. I had a injury and did not ride my Peugeot e bike for 3 months. This week the battery discharged while riding from 100 to 20% in the distance that it would normally go to 75%. I have charged and rode it four times with the same result. The charger gets hot and works and the bike controller displays fully charged. Battery is a joycube Philip. Is this a battery or b.m.s fault. How do I cure this. Thanks Mark S