Review: BTF Lighting 12 volt 3 amp power supply $15

Amazon Affiliate Link: https://amzn.to/48lqYtY Price as reviewed: $15 BTF-LIGHTING 12V 3A 36W Power Supply Adapter ETL Listed 100-240V AC to 12V DC Converter Class 2 Power Supply, 5.5x2.1mm Jack for for Low Voltage LED Strip Lights, CCTV, Router, Electronics This power supply has a 4 foot cord, I confirmed it was a 5.5x2.1mm barrel connector (tip positive) and provides 12.21 volts no-load. When loaded to 3 amps, the voltage sags down to 11.58 volts, but it still provides almost 35 watts at the full 3 amp draw. From the AC line it draws about 38 watts (92% efficient) and it had a power factor of 1.0. Without a load, the power supply draws less than 1 watt (my meter couldn't detect any draw). It has a 4' cable, and also comes with an adapter that converts the barrel connector to two screw terminals. There is a small amount of resistance in this connection, as it warmed up under the 3 amp load (to around 98 F). After running for 12 minutes at the full 3 amp load, the adapter was slightly warmer than ambient (gently warm to the touch) but not at all hot. Appears to meet all of it's specifications with only minor voltage sag at full load.