This is a generic, equivalent one, 100% compatible
Replaces Panasonic battery part numbers: HHR-P501 HHR-P504 HHR-P510 P-P501 P-P504 P-P510

Fits the following Panasonic Cordless Phones:
KX-TA38, FPC161/165/166, KX-T800, T3800-T38xx Series, T3900, TC9xx Series, TC14xx Series TC15xx Series, TC1696, TC17xx Series, TC18xx Series, TC9568XB, TCM9xx Series, TCL100B, KX-TG2120W, KX-TC1486B, KX-TC1400B, KX-TG2122W, KX-TC1700B, KX-TC1701B, KX-TC1701W, KX-TC1703B, KX-TC1710B, KX-TC1451B, KX-TC1451W, KX-TC1500B, KX-TC1500W, KX-TC1501B, KX-TC1501W, KX-TC1503B, KX-TC1503W, KX-TC1731B, KX-TC1520B, KX-TC1743W, KX-TC1484B, KX-TCM943-B, KX-TC1750B, KX-TC901-B

New replacement/equivalent HHR-P501 HHR-P504 HHR-P510 P-P501 P-P504 P-P510 cordless phone battery.

Specifications:

• Brand: generic/equivalent
• Condition: new, 1 year warranty!
• Voltage: 3.6V
• Capacity: 1200mAh
• Battery Type: Li-ion
• Dimensions: 50 x 42.3 x 15 (mm)