battery issues

Hi guys, I have a Haibike mountain bike. The bike battery is a Samsung 36 volt, 13.6 amp hour, 489.6 watt hour, lithium battery that take 4.5 hours to fully charge from empty. The battery charger says: input 100v-240v, 1.9A, 190W output 42v, 4A My Motorhome has AGM 6V batteries that recharge...

hello folks I bought a Golden Motor kit 6 months ago. Magic Pie 4 heartless hub motor with 48v 10 ah battery. Overall I am satisfied with the kit. Usually I was able to do 20 plus km with almost no pedalling on one charge. Since last week no more . I am now only able to reach 16 to 18 km. The...