Replacement Ni-MH 3.6V 700mAh Cordless Phone Battery for RCA 52522. Bring your compatible RCA cordless phone back to life with this reliable Ni-MH rechargeable battery. It features 3.6 volts and a 700mAh capacity (2.52Wh) with dimensions of 45.90 x 31.20 x 10.70mm. Compatible with several RCA models.