battery control in my spotlight camera pro

my camera works fine, my batteries work fine when battery #1 is low, near depletion, the camera pulls power from #2 (after pulling a battery out of compartment on the right looking at camera from front, I see #1 is right, 2 is left ) so after taking #1 out (from the right side compartment) the camera pulls power from #2 (left) correctly, still operating. After re-charging battery #1 and following day, inserting the re-charged battery back into the right compartment, the device suddenly switches back to pulling power from #1 (right), without continuing to pull from #2 (left). This seems to lead to always depleting/recharging the same battery over and over, without fully utilizing # 2 I expected the #2 battery to be the power source until it was itself at 3% or low, then switching back to #1. Is there a way to control this on the device ?    otherwise to fully utilize both batteries for longevity, I must physically place battery #2 into the right side to get it as the power source #2 is never drained from the #2 side (left), if you re-insert a #1...