Thanks. Those are the claimed battery times. As I wrote, I found the Polar OH1 to be more like 'a ride and a half ' (6 hours at the time) instead of the claimed 12 hours. I'm actually getting at least 12 hours from my Tickr Fit. Each charge lasts long enough that recharging isn't an inconvenience for my 2-3 hour rides.
The Scosche 24 reports cadence as well as HR, so the extra expense (compared to Polar and Wahoo) may be worth the extra $20 if you don't have a separate cadence sensor.