STK's Panasonic P-P511 Phone Battery - Two Pack 2200mAH NI-MH replaces Panasonic HHR-P402, Type 24, Type 30 batteries and ER-P511 cordless phone batteries for KX-TGA270S, KX-TG2740, KX-TG2357, KX-TG5240, KX-TG6500, KX-TGA510M, N4HKGMA00001, KX-TG6502, KX-FPG391, KX-TG2344, KX-TG2356, KX-FPG376, KX-FPG381, KX-TG2740s, +more. 2 Pack Panasonic P-P511 NIMH Batteries 2200mAh (POWWER Brand name) 100% OEM Compatible - Complies with or Exceeds OEM Panasonic P-P511 Battery specs Guaranteed to operate with your Panasonic P-P511 cordless phone. CE Safety Certification SterlingTek's P-P511 Battery 2 pack is warranted for 12 months