Fast-charging high-performance NiMH batteries suitable for various applications, including high-drain devices such as cordless phones, radios, GPS receivers, flash units, remote controls, and clocks. These powerful, rechargeable cylindrical batteries with 1.2 V are designed for resource-efficient use. The normal charging time is 16 hours at a maximum current of 100 mA, while the fast charging time is 144 minutes at a maximum current of 500 mA, utilizing minus delta U charging monitoring. These batteries have been specifically designed to maintain their charge capacity over extended storage periods. With a very low self-discharge rate, they remain ready for use for weeks. Nickel-metal hydride batteries have been extensively tested for charge/discharge performance, high current, short-circuit resistance, lifespan, and size.