Originally Posted by
hubcyclist
Possibly not an answer you're looking for, but one to consider depending on what you have. If you have an iPhone, I'd get the wahoo fitness speed/cadence sensor and either a polar or wahoo bluetooth heart rate monitor. I found that by turning off GPS tracking in cyclemeter, my phone only uses up maybe 5% power per hour, with the screen always on. It's about $120 for the set, so maybe not cheaper than other cycle computers, but I like the integration with my phone and such
I think the wahoo fitness computer now works with android, but I'm not sure. Last fall it was in beta testing. I don't want to spend $100 and find out it's not compatible with my Samsung S3. I rode with someone that used it this morning and it seemed cool, it pretty much just runs off of the phone in a jersey pocket but functions as a speedometer/cadence/other stuff.