3.6V 600mAh Ni-mh 27910 sd-7501 cordless phone battery Compatible with original Batteries: 27910 89-1323-00-00 SD-7501 23-959. All the Kruta Batteries comply CE, RoHS, MSDS, UN38.3 Certifications, Over-voltage, over-current, over-charge, and short-circuit protection & Best wire Length for the space. | Compatible with Motorola Phone Systems: Motorola C50, C51, E32, E33, E34, E51, E52, MD-4250, MD-4260, MD-7101, SD-4551, SD-4561, SD-4581, SD-4591, SD-7500, SD-7501, SD-7502, SD-7561, SD-7581, MD4250, MD4260, MD7101 | Compatible with AT&T Phone Systems: AT&T E1112, E1113, E1114, E1397, E1912, E1913, E1914, E1937, E2801, E2802B, E2803B, E2811, E2812B, E2813B, E2901, E2902, E2903, E2911, E2912, E2913, E2914, E3813, E2812, E3814, E560-2, E560-5, E5640, E5643, E5644B, E5654, E5901, E5902B, E5903B, E5910, E5911, E5912B, E5913B, E5914, E5926, E5939, E5655, E5917, E5918B, E5921, E5922B, E5923B, E5924B, E5927B, E5933, E5934, E5937, E5938, E5943, E5944, E5947, E597-1, E597-2, E598-1, E598-2, E6001, E6002, E6012B, E601 | Compatible with Radio Shack Phone Systems: RadioShack 23-959, 432105, ET2105 | Come with 2 Kruta 27910 Cordless phone battery packs. Choose one better than buying new phones