I get about 4 hours but it's only over 12 hours, I'm having to charge it twice a day. Mixed used, 4g+ and WiFi, I'm also finding Samsung Internet & Chrome are draining about 10% battery evey 30 minutes.
It's 15:57 here for me and I've used my flip4 for a little over an hour throughout today and I'm on 84%. I can't say I'm experiencing the same battery issues as others.... yet.