Cross-polarity resistant modified household batteries/accumulators of various types have recesses that interact with protrusions in battery compartments to enable correct polarity installation

摘要

The batteries/accumulators of various types are provided with recesses that interact with protrusions in battery compartments that are positioned to enable installation of batteries in battery compartments with the correct polarity. Cylindrical batteries can have two asymmetrical recess for use with latching rails in battery compartments.