Spare battery holder for most scope batteries - Vortex Rifle Scope CR2032 Battery Holder

Ever have your battery die at the least opportune moment? This holder fits on the picatinny rail and will hold any flat battery that's the size of a CR2032 or smaller(will not fit a CR2430) or slightly bigger than a penny but too small for a nickel. Holder has an O-ring to seal the compartment and a retaining cable to prevent cap loss. It slides easily onto the rail and has a simple locking mechanism that prevents it from falling off but the locking tab is easily lifted for removal. Made of polymer so it should be fairly durable and has a reasonable low profile. Cable length is fixed so it might be too long or too short.
Pros: Lots of pros
Cons: cable length is fixed

This review was written in the old system and had content requirements that are different than reviews written today.