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The US government uses self powering locks where the user turning the dial provides the power for operation. See http://www.kaba-mas.com/kaba-brand/products/9
by extrapickles 9y ago
The US government uses self powering locks where the user turning the dial provides the power for operation.
See http://www.kaba-mas.com/kaba-brand/products/906098/x-10.html http://www.kaba-mas.com/kaba-brand/products/906098/x-10.html for an example of one.