The Panasonic Equivalent P-P511 Cordless Phone Battery is for Select 2.4 GHz and 5.8 GHz Phones. If your phone uses one of these batteries, then this is the battery for you: Panasonic P-P511 Type 24, GE TL-26400, Energizer ER-P511 and ER-507. SterlingTek"s Equivalent Panasonic P-P511 Cordless Phone Battery is NiMH, which gives you no memory effect like Ni-CD. Guaranteed to work with the following Phones! Energizer: P-P511, GE: TL-26400, Panasonic: P-P511 Type 24 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, PQPP511SVC PP511A N4HKGMA00001 KXTGA510M KX-TGA510m KX-TGA510A KXTGA510 KX-TGA273S KXTGA273 KX-TGA272 KXTGA270S KXTGA270 KX-TG5110M KXTG5110 KXTG5100M KXTG5100 KXTG2770 KXTG2750 KXTG2740S KXTG2740 KXTG2730S KXTG2730 KXTG2720S KXTG2720 KXTG2700S KXTG2700 KXTG2287 KXTG2267 KX-TG2258 KXTG2257S KXTG2257 KXTG2247F KXTG2247 KXTG2239 KX-TG2238 KXTG2237 KXTG2236 KX-TG2235 KXTG2227 KXTG2222 KXTG2219 KX-TG2217 KXTG2215 KXTG2205 KXTG110M KXTA273 KXFPG381 KXFPG377 KXFPG376 KXFPG372 KX-FPG371 KXFPG371 KX-FP377 KX-FP376 KX-FP372, Radio Shack: 9602100 439007 439005 439004 439003 439002 23965.