K&F CONCEPT AA Rechargeable Lithium Battery with Charger 8 Pack 3600mWh 1.5V Li-ion High Capacity Batteries Fast Charging Storage Box for Outdoor Camera

【High-Capacity Rechargeable AA Lithium Batteries】 3600 mWh per battery, with a cycle life of over 1600 charge cycles. Compatible with game controllers, toys, doorbells, flashlights, and camera flashes. Maximum instantaneous discharge current: 3A. 【8-Slot Charging Storage Box】 Charges up to 8 AA batteries simultaneously. With a 15W (5V/3A) fast-charge input, it fully charges 8 AA lithium batteries in just 3.5 hours, keeping your devices powered and ready at all times. The charging box also doubles as a storage case to protect your batteries, offering both charging and storage functions. 【Constant 1.5V Output Voltage】 Features a regulated voltage output, making it perfect for high-drain devices. The lithium-ion batteries maintain a constant 1.5V during use. When the remaining charge drops below 10%, the output switches to a constant 1.0V to continue powering the device. This prevents voltage drops from causing devices to misread the battery as low, ensuring full utilization of the battery's capacity. 【Smart LED Display for Each Slot】 Allows you to accurately check the charging status of every individual battery. The flashing green light means charging, the steady green light means fully charged, and the constant red light signals a malfunction. 【Multiple Protections】 Equipped with overcharge, over-discharge, over-current, over-voltage, over-temperature, and short-circuit protection to ensure safe and stable charging. Suitable for home use, hiking, photography, and more.