Most devices that are powered by a non-rechargeable battery require the user to replace that battery. The device should be protected from accidental reverse battery installation. This means that designers of battery-powered devices should consider the effects of reverse polarity and make sure the battery or the device itself is not damaged if the battery is installed in reverse polarity.
Protection methods can be either mechanical or electrical. Mechanical protection methods include instruction symbols and battery holders which allow the insertion of the battery only in one direction. Certain battery types can be more difficult to protect from reverse battery polarity by mechanical means. In these cases, electrical protection methods are needed.
These guidelines present different protection methods for nPM2100 PMIC use cases and the main considerations for each approach.