ELEOPTION(TM) Phone Battery - 1500mAH NI-MH replaces Panasonic P-P511 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. 100% OEM Compatible - Complies with or Exceeds OEM Panasonic P-P511 Battery specs Guaranteed to operate with your Panasonic P-P511 cordless phone Stay connected with families and friends by getting extra battery power today. Best replacement for the original battery with comparable standby and talk time. Great bargain with excellent quality guaranteed. Color: Black. Voltage: 3.6V.