Smartoools AAA 1.5V Type-C Rechargeable Batteries

These rechargeable Lithium-ion (Li-ion) batteries feature a built-in USB-C charging port, making them highly convenient and eliminating the need for a separate charger. Internally, they use advanced chemical materials such as lithium cobalt oxide or LiFePO4 as the cathode and graphite as the anode, with a lithium-based electrolyte that enables the movement of ions for efficient energy storage and release. The battery is enclosed in a durable steel or nickel-plated shell to ensure safety and prevent leakage. A key component is the integrated circuit (PCB), which manages the charging process by converting the 5V USB-C input into a stable 1.5V output. Additionally, copper and aluminum foils are used as current collectors, while plastic or polymer insulators separate the terminals for safe operation.

From the specifications, the battery offers a capacity of 750mWh and delivers a constant 1.5V output, ensuring stable performance for compatible devices. It supports 5V Type-C charging, typically taking around 1 to 1.5 hours to fully charge, and can last up to approximately 1200 charge cycles. The inclusion of a USB-C port on the battery itself makes it especially user-friendly and portable. However, the packaging contains several typographical errors, which may indicate a generic manufacturer, so it is recommended to use the batteries carefully and avoid leaving them charging unattended for long periods.