No you cannot use that because it is actually exceeding the current rating. Can I use 5V 1A for 5V 2A? If you use 5V 2A for the use of 5V 1A, it will work. There will be a dip in the output voltage if you operate a load of 2.5 A rated value. Can I use 12V on 5V? The device will very likely burn out. Thisis a +/- 12v dual power supply circuit diagram using 7812 and 7912. We use an LM7812 voltage regulator IC for +12V and LM7912 for -12V. This circuit is suitable for a preamplifier tone control with an OP-AMP circuit. It can deliver an output current of not more than 1A. I will show you, an interesting concept. Compatiblewith 12V /0.5A , 12V /1A , 12V / 1.2A , 12V / 1.5A and 12V / 2A Routers For Routers with 9V, 0.6A power rating, please use Power Adaptor with rating 9V, 1A or higher to charge the UPS. › See more product details
Abasic home battery charger incorporates a transformer and rectifier, to change the mains 110/220 volt alternating current to 12 volt direct current, and allows the mains supply to provide a charging current at a rate determined by the state of the battery. In the case of a battery in good condition, the rate of charge may be around 3 to 6 amps with a normal home charger.
USB5V to DC 12V 1A 1.5A 2A Power Cable Cord Converter for Alexa Dot 3rd 4th Gen 5th Gen 2022, Kids Edition/H23K37/C78MP8 Charger 15W,LED Light Strip, Router, Surveillance, CCTV Camera,Baby Monitor USB to 9v, 5v to 12v Step Up, DROK USB Cable DC 5V Boost to 9V 12V Voltage Converter 1A Step-up Volt Transformer Power Regulator Line with LED ShopRefurbished. Partner. Buy the accessories for your Reolink security cameras and NVRs, including batteries, solar panels, skins, Ethernet cables, power extension cables, brackets, etc. Canyou use a 12V 1a charger on a 12V 1.5 a device or 12v 2a device ? You can use a 12V supply with a higher current rating, but not a lower one. The device will only draw the current it wants, but the supply has to able to put out the maximum current the device wants. MIKASHU 12V 1A DC Power Adapter, Powers Supply, SMPS for LCD Monitor, TV

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Im assuming that the ethernet cable is only good for 5V 1A max. Not 12v 1A. Voltage rating is about insulation, and 12V is fine. Current rating is about voltage drop due to wire resistance, and fire hazard if the wire heats too much. First thing you should do is grab a multimeter and measure how much current your camera actually uses. .
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    • can i use 12v 1a for 12v 2a