Replacement 3.6V 700mAh Ni-MH Cordless Phone Battery for RCA 27910. Restore power and talk time to your compatible cordless phone with this high-quality Nickel-Metal Hydride battery. Rated at 700mAh / 2.52Wh. Dimensions: 45.90 x 31.20 x 10.70mm. Compatible with many models that use the 27910 battery type.