The polarization protection prevents damage to the batteries in case they are accidentally inserted incorrectly. Once the batteries are fully charged, the device switches to maintenance charging. With AlwaysReady, the problem of self-discharging batteries is resolved. The efficient batteries have minimal self-discharge, retaining 85% capacity even after a year of storage. This ensures that the battery is always ready for use over a long period without needing to be charged first. This increases the lifespan and efficiency of the batteries. The batteries are pre-charged, so they are ready to use immediately. Up to 1000 charging cycles are possible, making them gentle on the environment and your wallet.