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EEMB ER14250 1/2AA 3.6V 1200mAh Lithium Battery Li-SOCL₂ Non-Rechargeable XL-050F SB-AA02 LS14250 TL-5902 TL-2150 for Dogwatch Dog Collar and Some of Movement Monitor/Home Security/Alarm System (10): Amazon.co.uk: Electronics & Photo