Polar are about to release a new HR sensor by the look of it, the H7i. It’s waterproof to 30m so likely to replace the H7. This could be a sign of imminent v800 successor too, since these sort of things are often released together. We can only speculate on what the H7i contains but it’s likely to be running dynamics or store and forward swim data similar to what everyone else has been doing for a while. To my eye, the device doesn’t look smaller than the old one, which would be a mistake at this point as the Polar devices already looked massive even before Garmin made theirs smaller.
In the test report, the unit is described as “BLE, 5kHz inductive link, accelerometer” so I think we can confidently predict some kind of running dynamics or at least cadence from the HRM will be included in the v800 replacement, and certainly in the H7i.
The report later states:
“The test sample consists of a Polar H7i heart rate sensor that uses Bluetooth Smart technology providing ECG-accurate heart rate to any Bluetooth Smart ready device utilizing standard heart rate profile. There is also 5 kHz HYBRID data transfer. H7i includes memory for 1 training event and uses replaceable coin cell battery. Customer itself can update new firmware to device when available. H7i is used with comfortable and soft heart rate strap.”
This suggests store and forward technology will be included for at least one activity. Although Polar don’t need to store and forward, due to their 5kHz mode, store and forward is a much more reliable way to guarantee complete data when used for in water activity. This could also suggest that high definition data capture will be present. I’ve mentioned this before as a possible future feature on these devices, and with BTLE there simply isn’t enough bandwidth to transmit hi-def heart rate on the go. This would drain the battery quickly and serve no purpose since the data is not useful while in the activity. Waiting to upload later makes complete sense, however, since that would allow great analytics of heart data and the single large burst of data would not run the battery down the way constant transmission would. Either way, this device has memory for one activity, and there must be a reason for that!