The Ostation Ecolast 1.5V rechargeable Li-ion battery is the world’s first AA-sized rechargeable battery to integrate a battery management system. Each cell features an embedded chip for real-time temperature monitoring and health management, seamlessly working with the Ostation 2 Series charger to optimize charging current for safety and efficiency. At the same time, per-cell ID and health are accessible, ensuring truly digitalized management. A proprietary technology ensures a constant 1.5V output, allowing safe mixed use without voltage spikes. Dual-layer enclosure prevents leakage and enhances durability, while both the positive cap and pogo pin are made of pure copper with gold plating to minimize resistance and support up to 3A discharge for demanding devices. Ecolast Li-ion batteries fully replace standard 1.5V alkaline cells, fitting all devices designed for 1.5V batteries. Supporting up to 1,000 cycles and featuring a built-in BMS, it encourages wider use of rechargeable batteries and supports environmental sustainability.