I honestly have to state that if there is a "pilfering" problem with batteries it is solved by making the officers purchase their own. We've had some similiar situations here, and we usually issue/give/supply a calculated amount, and sell extras at a reduced price.
Paying for consumables out of pocket, even if they are relatively cheap, seems to induce a slight amount of responsibility.
Back on topic, I believe that a cross-utilization of the flashlight is wrong. The Stinger is a larger light for hand-held use, and the SF weaponlights are small, light, and importantly to me, always attached to the weapon.
They get the freshest batteries, and those are rotated out to handheld lights. The cost of the mount plus the light is too close to a real SF forend for me.
However, I'm glad to see innovation and competition.