GP Lithium 9 volt block batteries, 9 V e-block, 10 year battery long life (5 block batteries), ideal for e.g. smoke detectors, fire detectors, microphones etc.: Amazon.co.uk: DIY & Tools
Varta Rechargeable Battery Ni-MH 9 Volt Block 200 mAh 56722) Blister Pack of 1: Amazon.de: Electronics & Photo
Batterie Industrial 9V-Block - 10er pack: Amazon.de: Elektronik & Foto
VARTA Longlife Power 9V block 6LP3146 battery, alkaline E-block batteries ideal for fire alarms smoke detector tuner: Amazon.de: Electronics & Photo
Battery Lithium 9 Volt Block Varta – Professional Lithium: Amazon.de: Electronics & Photo
Wentronic Battery Holder for 9 Volt Block Battery in Closed Housing with Switch Pack of 8: Amazon.de: Electronics & Photo
Tronic® eco Batteries 9 Volt Block 200 mAh – Rechargeable Batteries: Amazon.co.uk: Electronics & Photo
Amazon.com: MaximalPower 9 Volt Li-Ion Rechargeable Battery HIGH CAPACITY 550mAh 9V Block : Health & Household
GP Extra Alkaline 9 V Block Battery Longlife 9 V Batteries with High Energy Density for Long Life: Amazon.de: Electronics & Photo
Energizer Original Battery Ultra Plus E-Block 9 Volt 2x Pack of 1: Amazon.de: Electronics & Photo