How can the GPS operate on three AAA batteries and still have decent reception?
SPOT is designed to be extremely power efficient. That’s why it can send so many messages on one set of three AAA batteries. The downside is that it only turns on the GPS receiver when it needs to send a message; therefore, you’re not going to get constant reassurance that you have good GPS position data. Since it doesn’t have a GlobalStar receiver, no acknowledgment can be sent back to indicate that a message was transmitted successfully as was pointed out earlier.
