mjd1988
Guru
I found it reasonable but tend to have bad luck with lithium vatteries- it's hard to get good ones in northern Ireland from Amazon though. That's been true of Garmin and wahoo too so it's worked fine compared to those.
Ultimately I ended up with; LIVLOV V8 Rechargeable Heart Rate Monitor Chest Strap, 5.3 Khz ANT+ Bluetooth Chest Heart Rate Monitor, Waterproof HR Sensor for Polar Wahoo Peloton Zwift DDP Yoga https://amzn.eu/d/j018pTw
Not sure if maybe @bobinski had recommended it