The Panasonic gyser battery is a high-performance, general-purpose D-size (or ‘Big Battery’) primary battery. It is a heavy-duty, Zinc-Carbon battery designed to provide reliable, steady power for devices with moderate to low power consumption for everyday use. Key Features: Battery Type: D Size (R20 / UM-1UH), also known as “Big Battery.” Chemistry: Zinc-Carbon (Heavy Duty). Voltage: 1.5 V. Intended Use: Best suited for devices like flashlights/torchlights, transistor radios, wall clocks, remote controls, and toys. Performance: Designed to be an economic and reliable power source with superior performance for general needs. Safety/Environment: Often advertised as Mercury and Cadmium free. Design: Features a blue and white label with the “HYPER” designation
