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Best Choice Duracell 
Duracell Specialty Lithium Coin CR2032, 4 Pack Batteries Lithium coin batteries uses high-purity lithiumBest Value LiCB 
LiCB CR2032 3V Lithium Battery(10-Pack) - High Quality: LiCB CR2032 batteries are tested under strict quality control standards, CE and ROHS certified, ensuring15% Off Amazon Basics 
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Input current: 2 A - 5 A.SHNITPWR SHNITPWR Universal Power Supply 3V 4.5V 5V 6V 9V 12V Power Supply AC/DC 1A 2A 2.5A 30W Switching Power Supply Adapter fo Input: AC 100~240V, 50/60Hz; Output: DC 3V 4.5V 5V 6V 7.5V 9V 12V adjustable, max 2.5A 30W; It can be powered with any eeasyday Easyday Universal AU Power Supply Adapter AC 100-220V to DC Wall Charger Power Adapter (3V-12V 5.5X2.1mm DC) Universal AC/DC Adapter - AC Input:100-240V 0.25A 50/60Hz, DC Output:3V/4.5V/5V/6V/7.5V/9V/12V. Advanced secure techniquDWEII DWEII 2PACK DC Buck Converter Voltage Regulator 8-22V to 3-15V 5V 12V 3A Adjustable Output Power Supply Transformer Step With reverse connection protection / overload / overcurrent / overheat / low voltage protection, stable and reliable