What steps to take before changing to new batteries if any?

I rotate them. I get a couple of hours left on my batteries.

@RedDeerGuy1 You take out the present one/s and switch it/them with the earlier one/s? Ok.

@flo Also switch the position of the batteries in the same device. Also rotating the batteries with out removing them. It works for me. Cleaning the head connectors helps too.

How do you rotate without removing?

@flo. Spin the aa and aaa batteries in the device without removing them. It works for my cordless keyboard and remote controls. I am not kidding. It gives a boost long enough to buy new batteries.
It won’t work on a nine volt battery. AA , AAA, C and D works for me.

Ok, thanks.

Soemtimes the problem is simply a tiny bit of corrosion that has formed between the contacts. Spinning the batteries can be a quick way to break it loose. The next level is taking out the batteries and rubbing the contacts on a newspaper or stack of typing paper. If there is corrosion build-up you can see it on the paper.
While the batteries are out I measure the voltage with a $5 (or free) meter from Harbor Freight.

@LuckyGuy I’d be very carefull not to let any part of the powder end up anywhere.