Only just seen this so you may well have sorted it.
However this my help you and others if you have a problem with batteries discharging for no reason.
stay safe
Make sure the
battery is fully charged, (12.6 volts.)
Unplug or switch off all devices and make sure no electrical components are on that are run from the leasure
battery.
Remove the negative
battery cable from the negative
battery terminal.
Set up a digital multimeter.
Choose a digital meter than can read up to 20 amps and down to 200 milliamps.
The multimeter has both a black wire and a red wire attached to it as well as several different input slots. Plug the black wire to the "com" (common) input and plug the red wire into the highest amp input (usually 20A). Set the dial on the multimeter to measure amps.
Attach the multimeter between the negative
battery cable and terminal. (Place the red lead through the clamp at the end of the negative
battery cable. Touch the black lead to the negative
battery terminal.) You can use plastic clamps to secure the leads in place so your hands are free and the meter continues to operate.
You have a parasitic draw if the reading is more than 50 milliamps. There are a few things that constantly draw power in a vehicle, such as the clock on the radio, so it’s normal to have a reading between 20 and 50 milliamps. If your reading is higher than that, it means there’s a draw and something is using too much power.