This wonβt happen if you are constantly using the remote and batteries,
It still can. I have found that the most common cause of batteries going south like this(when being used actively) is when there is a voltage mismatch between the batteries.
Always make sure you use batteries from the same pack when you put them together in a device. That or get a voltmeter out and check to make sure their voltage is the same.
This is less of an issue when the batteries are in parallel, but almost all cases where batteries are combined in electronics, they are putting them in serial.