I find the battery life of BT HRM, GPS and RFLKT to be lacking. I've finished 5-6 hour rides with about 5% left from full battery. Still this is preferable to starting a ride with a garmin that's 100% dead at the start of the ride and needing to charge 2 separate devices. Just bought an extra battery case for this purpose. I'll let you know how it goes once my stages PM comes in this weekend. I'll experiment with ANT+ and BTLE mode.http://support.apple.com/kb/ht1355
Can you run your phone in airplane mode and still get GPS + Bluetooth for battery life improvement? I imagine a lot of it is due to roaming in areas with very poor reception.
It appears this allows you to turn BT on. I don't think the cellular consumes much power, but try. Clearly, having the gps on versus gps off makes a big difference. I don't strava, so I don't care about gps, and if I get lost I can reenabl
The RFLKT is open source, it'd be great if someone would develop a way to enable some sort of turn by turn or other gps function with it-nice for club rides etc. but irrelevant for data logging.
If you want to use the stages via ant you'll need to kill the bt on the phone and pair it as a separate device using the RFLKT bridge. No point in that, really, as it uses more, not less, power as I understand it. Plus, if the RFLKT freezes or dies you don't necessarily lose power logging, just mileage and speed if your speed sensor is ant. Hence why I'm switching to all BT.
I'm curious as to whether the extra battery adds interference with the already marginal RFLKT reception....let me know. I've never actually used my aux battery with the RFLKT.