4-slot rechargeable battery charger for fast charging of AA and AAA batteries with USB port

Compatible with AA and AAA batteries: Compatible with rechargeable AA and AAA Ni-Cd/Ni-MH batteries, it can charge up to 4 batteries simultaneously. Intelligent constant current and constant voltage charging: Voltage and temperature control ensure saturation and safe charging. Charging safety is guaranteed: the battery automatically stops charging once fully charged. LCD display with light sensor: The charger is equipped with a smart LCD indicator light. When the battery is charging, the corresponding light turns red. Once fully charged, the light automatically turns green. Heat dissipation window: The charger has heat dissipation windows at both ends to dissipate the heat generated during charging. The battery may get warm during charging, which is normal. Quality after-sales service: We are committed to providing our customers with a quality shopping experience. If you have any questions about the product during use, please contact us and we will resolve the issue for you as soon as possible.