Polar Verity Sense
30 h per charge and 600 h of memory in a 5 g sensor. One 16-person study put it 1.43 bpm from an H10, but every device in it was Polar's.
What the maker states
| Battery | 30 h, Full charge |
|---|---|
| Weight | 19 g, With armband; 5 g sensor only |
| Water rating | WR50 |
| Heart rate sensor | Optical, upper arm |
| External sensors | 2 Bluetooth channels, ANT+ |
| Internal memory | Up to 600 h, 16 Mb |