@commname52 YW. Every 6 months? I'd not seen this and am happy with the performance I'm getting. Several weeks; I'd replaced mine last on December 15th and my Zip, including many syncs, is still showing 100% full on the app. It's a great product IMO. It was inexpensive, I've had mine for years, and still works fantastically. I *did* have battery issues a year ago which is when I began lifting the metal tab, disabling all-day-sync and using the neoprene gloves. Unsure what battery brand you're using or if it makes a big difference, but I'm using SONY, UPC 0008562007635. Previously, I'd used "Sunbeam" (Dollar Tree) and replaced it more frequently. I get feeling frustrated when something doesn't work as intended or expected. Personally, I'm grateful Fitbit allows me to use discontinued trackers. I still have not only the Zip but also the One and a Surge. Eventually, when budget allows, I might get a newer model, but maybe not as still very happy with these antiquated models. BTW, This is a user forum, so you're chatting with other users like me and you, but Fitbit reps occasionally pop in. Cheers!
PS. Here's the eBay listing I'd purchased from, I'd written ~$2. It's specifically $2.55 for a 5-pack. Not too shabby! https://www.ebay.com/itm/174031163036 you can find other 5-packs for under $1 each, though unsure of the quality. These have worked better than any other CR2025's I've used before. Perhaps these will work better for you too.
