Synergy Digital Cordless Phone Battery, Compatible with Siemens EBA-510 Cordless Phone Battery (Li-ion, 3.7V, 750mAh)Specifications:Voltage: 3.7VCapacity: 750mAhComposition: Li-ionCompatible with KPN Cordless Phone(s): 500 Micro, Chicago 700E, Chicago 700E BTCompatible with Siemens Cordless Phone(s): Gigaset SL1 COLOR, Gigaset SL3 Pro, Gigaset SL3 professional, Gigaset SL360, Gigaset SL365, Gigaset SL37, Gigaset SL75 WLAN, OptiPoint WL 2 Professional, SL2 professional, SL3 professional, SL75 WLAN, WL2 professional, GIGASET 4015, Gigaset SL1, Gigaset SL74, Gigaset SL100, Gigaset 4015 Micro, Gigaset MT50, Gigaset SL56, Gigaset SL370, Gigaset SL37H, Gigaset SL150, Gigaset SL550, Gigaset SL555, Gigaset SL55, Gigaset SL565, Gigaset SL2 Professional, Gigaset S440, Gigaset S445, Gigaset SX440, Gigaset SX445, Gigaset S44, Gigaset SL375, Gigaset SL560, Gigaset SL2, Gigaset SL3, Gigaset SL740, Gigaset SL440, Gigaset SLX740isdn , Optipoint WL2, EBA-510, L36145-K1310-X401, L36880-N5601-A100, S30852-D1752-X1, V30145-K1310-X250, V30145-K1310-X401Compatible with Swisscom Cordless Phone(s): TOP S600Compatible with Telekom Cordless Phone(s): Octophon SL3 professional, T-Sinus 701A, T-Sinus 701M, T-Sinus 701MMS, T-Sinus 711MMS