Replacement Ni-MH 3.6V 700mAh Cordless Phone Battery for RCA 21018GE3. This high-quality Nickel-Metal Hydride battery is a perfect fit for your compatible device, ensuring long-lasting performance and reliable power. Dimensions are approximately 45.90 x 31.20 x 10.70mm. Upgrade your phone's talk time with this durable and dependable power source.