The measurement at the wrist is ok but during some activities it could be better. Which HRM strap works well with VA3. How long usually lasts the battery.
I have the Garmin HRM-Run which is ANT+ only and Wahoo Tickr X which is both ANT+ and Bluetooth. With the Garmin I get the occasional drop out but not bad but the Wahoo paired as Bluetooth has been rock solid.
If all you need is plain heart rate, then any ANT+ or BLE strap will do just fine. For a daily use I have a cheap (about $20) adidas strap. Heart rate is reported no worse than from the expensive HRM-Tri.
I have an old Garmin soft strap for years that works great. I believe it's even been discontinued. I change the battery once a year just to keep it fresh. If you go with a chest strap just remember to keep it clean. Salt from sweat can build up and it will mess up your readings. I place mine in a bowl of warm water with a drop or two of dish soap. I'll shake it up for 5 minutes, rinse it off and hang dry. I do this weekly and it's never failed me.
