On the Macbooks. I looked up battery draining on Google for MacBook’s and below are some settings that may help before replacing computers for battery drainage issues.
Put a checkmark in the checkbox for “When the display is sleeping”.
Uncheck the checkbox for “Allow Bluetooth devices to wake this computer”
Uncheck, "Enable Power Nap while on battery power" and make sure the “Turn display off after” is set to a low setting.
Lower screen brightness to save battery power by moving the slider to the left (as much as possible) on the Brightness setting.
