The A3 EOS is a bright little light, perfect for pocket carry or anywhere else where size and weight matter, but you still want a lot of light.
Specifications:
Cree 7090-XP-E Q5, life span up to 50000 hours
Operating voltage: 0.9V - 3.0V
Uses 1 x AAA, 1 x Rechargeable NiMh AAA, or 1 x 10420 (due to the small body size, 10420 batteries are not recommended since they may cause the light to become hot very quickly).