Battery Tester Circuit with 3 LEDS
It looks good but there is a problem as spotted by @Bimpelrekkie above -  the comparator inputs always have volts applied, which means they will draw current and may fail as you violate the max ratings at the input.

This modification should correct those problems:







simulate this circuit &ndash; Schematic created using CircuitLab

Now the circuit is completely isolated when the (double pole) switch is not pressed. The diode protects the comparator inputs, given that the two poles of the switch will not close at exactly the same time.