Frankly, I don't know who is rebranding who, and neither do I care. Given how things work in Taiwan, it's equally possible that neither company is the originator, and the designs emanate from another anonymous entity. (Pure speculation on my part.)

But the buyGPSnow sales team did get their models mixed up, as noted further down the thread. The i-Blue 737 and Qstarz BT-Q810 are apparently equivalent, while the BT-Q818 adds the extra capacity battery and a new case that does not appear in the i-Blue lineup.

GpsPasSion found the 818's battery life slightly off spec (28+ hours, versus 32 advertised), but still disproportionately longer than the i-Blue 737 (23 hours) given the 10% increase in Li-Ion capacity. This supports the claim that the 818 is more than just an 810 with a battery upgrade:

http://www.gpspassion.com/forumsen/t...TOPIC_ID=75868