The T-Mobile G1 (HTC Magic) had horrendous battery life when it first came out. Gradually the battery life got better and better as they released more software

The T-Mobile G1 (HTC Magic) had horrendous battery life when it first came out. Gradually the battery life got better and better as they released more software updates. These were changes to the OS that made it use less battery life, however. There might not be as much "free juice" to squeeze out of this device. To be fair though, this is the first phone-like WiMAX device, and it's likely that they don't really understand the real world conditions of handheld WiMAX devices yet.