I hate most harbor freight and made in china products, but the cheap digital calipers work fine for reloading and general work in the garage and on my trucks. The cheap ones don't feel great, much like a stock or cheap trigger on a gun, but it still gets the job done.
Try using batteries that are labeled SR instead of LR, which means they are made with silver oxide. The silver batteries last much longer. The cheap batteries start out with a lower voltage and then drop quickly as they are used. I had one set of cheap calipers that would flash the display a couple weeks after installing a new batter. I switched to the silver based batteries and now I can't remember when I had to change the battery last.
He who dies with the most tools/toys wins