HOMEPowerBatteriesSpare battery for FRITZ!Fon C5 (Li-Io, 3.7V, 750mAh) FRITZ!Box 15-18860 Spare battery for FRITZ!Fon C5 (Li-Io, 3.7V, 750mAh) SKU #15-18860 Oh oh! That product is no longer available... Check out these alternatives Cradlepoint 170848-000 Optional Battery for E100 Router, 7.2V, 10000mAh Details QNAP BBU-A01-2200MAH Battery Backup Unit for QNAP ES series NAS Details Generic CS-YKW530CL Rechargeable Li-ion battery for Yealink W53 and W73 phones Details Generic CS-YKW560CL Rechargeable 1300mAh Li-ion battery for Yealink W56 and W... Details VIEW ALL Batteries