I have an older x2001 quadloop that I replaced the battery on this year. I am using this on a property where I only mow every three weeks. The new battery discharges completely over a 3 week period and is measuring 0 volts. Mower will start with a jump box and shows 15 volts while charging. The mower will start fine the rest of the day but the battery will be dead again 3 weeks later. I guess I could have gotten a dud battery or I have developed some sort of parasitic draw. Has anyone experienced this or have any troubleshooting tips to share? Thanks!