4CS LiitoKala USB 9V Battery 1100mAh Lithium Rechargeable Battery 6F22 for Metal Detector Multimeter Microphone Remote Control - AliExpress
RE 7.4V 1100mAh Battery, Battery Capacity: 1100 Mah, Voltage: 7.4 V
Amazon.com: Exell 2/3A Size 1.2V 1100mAh NiMH Rechargeable Battery w/Tabs for use with Cameras, camcorders, Mobile Phones, pagers, Instruments/Equipment, high Power Static Applications : Health & Household