EOTech 553 - Manual (Page 20)

2.1.1 Hood
The Reflex Sight is equipped with a protective hood. This hood is pre-assembled at the factory.
Should your hood require repair or replacement, please contact your unit armorer for repair,
replacement, or turn in to the manufacturer (L-3 EOTech) for repair or replacement.
2.1.2 Batteries
Two (2) commonly available Type N 1.5 volt alkaline, AA 1.5 volt alkaline or 123 Lithium
batteries power your Reflex Sight depending on the model. A set of batteries comes with your
sight. The Reflex Sight is designed to maintain constant brightness at a particular setting as the
batteries drain down. The reticle brightness will not fade gradually as the batteries run down,
but rather, shut down abruptly. The first indication of the batteries draining is the reticle blinking
when the unit is turned on (see Electronic Features 2.1.4). Another indication of low batteries
is the reticle pattern blinking off and on during recoil. With high recoil guns, this can occur
before the battery check indicates low battery condition. If the reticle pattern blinks off and on
during recoil or turns off suddenly, replace the batteries.
Please read and follow the battery
replacement and battery check procedures described in this Manual. Alkaline batteries from
different manufacturers are not all constructed the same way. Tests show some brands are
more susceptible to degradation by the shock of recoil. We recommend the use of Eveready
Energizer™ batteries with the Reflex Sight. It is always good practice to replace the batteries
with a fresh set before a mission.
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