Well to be fair, that's because you can't turn it off right?
Firecop -
Aimpoints are legendary for their battery life. They don't utilize the same technology that other red-dots use (that's part of what makes them friggin awesome - that, their weight, their low-cost compared to other high-end optics, and their durability).
You can't turn it off? They don't have an on/off switch?