I have never understood the appeal of a digital. My finger generally can't tell the difference between 5 pounds and 5-1/4 pounds -- whether the trigger is clean or gritty, or exhibits stacking, makes a more perceptible difference than just the pull weight. I mostly use a standard RCBS analog trigger pull gauge, which has a range up to 8 pounds. For DA revolvers, where the DA pull is more than 8 pounds, I have a Feather River analog scale. It's basically the same as the RCBS, except that it measures up to 25 pounds.
And they don't need batteries.