USB Lithium Battery Charger

Compatible Cylindrical Batteries:  Sizes: 18650, 21700, 22650, 16340 Lithium-ion with charging voltage of 4.2V Not to be used for LFP or Sodium Overview: This Universal USB Battery Charger Adapter is an intelligent, single-slot charger designed for a variety of rechargeable 3.7V nominal lithium batteries, including 18650, 21700, 22650, and 16340. With advanced safety features and a sleek design, this charger ensures that your batteries are charged efficiently and safely, making it an essential accessory for your power needs. Key Features: Intelligent Charging: Equipped with IC control and a built-in reference voltage to guarantee a full battery charge (with a charge rate of ≥99%), ensuring both efficiency and safety. Polarity Recognition: Automatically recognizes battery polarity, allowing for charging in both positive and negative orientations, enhancing user convenience and safety. Short-Circuit Protection: Features a short-circuit protection function where the short-circuit IC