D4000mAh K 4.8V Ni-MH Battery: High-capacity, low-temperature-resistant rechargeable battery ideal for flashlights, medical devices, emergency lighting, and power tools. With a robust 500-cycle life, wide charging range (-40°C to +55°C), and stable performance under 0.2C max discharge, this OEM/ODM-supported Ni-MH battery delivers reliable energy storage for industrial and portable applications requiring durability in extreme conditions.More
