9V GOOP Rechargeable Battery The 9V GOOP Rechargeable Battery delivers dependable power for your essential devices. Built with premium rechargeable technology, it offers consistent 9V output and a long-lasting 500mAh capacity (or your preferred rating). Ideal for use in smoke detectors, wireless microphones, and professional equipment, this battery is designed for durability and performance. Recharge it hundreds of times and reduce your environmental impact. Brand: GOOP Voltage: 9V Type: Rechargeable (Li-ion or NiMH) High Capacity: Up to 500mAh Recharge Cycles: 500+ Uses: Audio gear, alarms, testing tools, toys, and more