Query approved.

Hi Friend, The main chance for battery drain could be some short circuit in your electrical circuit. This drains your battery to the end - check the remote system wires.

Some other reasons..

Check your battery distilled water level - if less then top it up and give it for a charge.

If your brake light switch is not adjusted properly, the tail lamp keeps glowing, ends in battery drain - replace/adjust the switch.

check if the battery gets enough voltage to get charged - with a multi meter (check also for loose connection in the battery terminals).