The Battery For NTL R77 CS-CPB8011 is made from grade A material for better performance. CS-CPB8011 NTL.
Replacement Battery For NTL R77 R66 R88 700mAh 3.6V Cordless Phone
Battery For NTL R66, R77, R88
Battery For NTL R88 CS-CPB8011
2 Pack 6040mAh 3.65V Rechargeable Battery for Ring Battery Compatible with 2/3/4/3 Plus Video Doorbell, Stick Cam Battery(2nd & 3rd Gen), Spotlight Camera and Peephole Battery
GE 5 2459 Cordless Phone Battery 3.6 Volt, Ni-CD 600 mAh – Replacement Battery For GE Battery Ultra High Capacity Battery