Product Details If you are looking for an AVAYA Cordless Phone Batteries then you are in the right place. Our Replacement Cordless Phone Batteries have a Nickel Metal Hydride (NiMH) battery chemistry and are rated at 3.6 Volts 1800 mAh." These replacement Cordless Phone Batteries are in stock and ready to ship! This battery is an exact replacement battery for a AVAYA 9631 Cordless Telephone. Product Specifications This battery works with AVAYA 9631 view all |