The 1.5V constant voltage of Lithium AA & AAA rechargeable batteries are designed to deliver a stable output of 1.5 volts throughout most of their discharge cycle. This feature ensures consistent and reliable performance for devices that require a steady voltage source, such as many electronic gadgets and appliances. High Energy Density: Lithium batteries offer a high energy density, meaning they can store a large amount of energy in a compact size, providing long-lasting power for electronic devices. Rechargeable: These batteries are rechargeable, making them a cost-effective and eco-friendly choice compared to single-use disposable batteries. Longer Lifespan: Lithium batteries typically have a longer lifespan compared to traditional rechargeable batteries, which translates to more charge and discharge cycles. Quick Charging: They often have a faster charging time compared to other rechargeable batteries, allowing for quick turnaround times between uses. Lightweight: Lithium batteries are lightweight, making them ideal for portable devices and reducing the overall weight of equipment. Low Self-Discharge Rate: These batteries have a low self-discharge rate, meaning they can hold their charge for extended periods when not in use.