All our batteries have a three year warranty. Ni-MH, 1.25V, 2800 mAh. 4-Count Package: This package from Synergy Digital includes four Rechargeable AA Batteries, allowing you to charge up virtually any device that uses this battery size. If you don’t need all four, power up another device or keep spares for future use. Long-Lasting Use: Each Ultra Hi-Capacity AA Battery is made with high-quality Japanese cells to ensure long-lasting use. Additionally, the high hydrogen content of Nickel Metal Hydride is double the battery capacity compared to nickel-cadmium batteries. Superior Performance: Made of Nickel Metal Hydride which is free of toxic heavy metals to deliver safe, ultra-strong power for your devices, each 1.25 volt, 2800mAh battery will last for long periods of time so you can enjoy continual usage. Rechargeable Design: Make sure your devices are powered and ready to go when you need them. Synergy Digital’s Ni-MH, 2800 mAh Ultra Hi-Capacity AA Batteries are rechargeable, offering long-term value with less waste. High-Quality Batteries: Bring your cordless phone, digital camera, mp3 player, remote control, children’s toys and other devices back to life with these Synergy Digital Ni-MH, 2800 mAh Ultra Hi-Capacity Rechargeable AA Batteries.