Answer the call with the onn. Rechargeable Cordless Phone Battery. If your cordless home phone quickly goes dead or loses its signal when you step away from the receiver you might need a new battery. This replacement model fits many different phones including models by GE AT&T V-Tech and more. Simply compare the plug voltage and size of this 550mAh battery to your current handheld device to see if it’s compatible. Installing your new cordless phone battery is easy. Simply remove the old battery connect the new battery and allow it to charge on the phone receiver for at least 16 hours before making a call. This reliable battery gives you the freedom to take phone calls while doing your laundry cooking getting ready for the day or simply walking from room to room. Enjoy the full range of your telephone with the onn. Rechargeable Cordless Phone Battery.