It's bad enough you have to carry your phone around with the Amiigo's. Add to that the setting up of AUTO SYNC & BLE SAFE MODE for MY DEVICES in the Amiigo App and it will
kill your phones battery life very quickly. Less than 24 hours. Throw in a few phone calls and streaming audio and I'm charging my Nexus 4 after only 12 hours.
Never mind that the bluetooth pairing of the amiigos makes it impossible to use bluetooth for anything else once tracking...