# Choose a power source with high efficiency
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 Efficiency of the power source is a crucial factor to consider in IoT device design. It is recommended to choose power supplies with at least 90% efficiency across all load conditions, such as [80PLUS Titanium-rated](https://www.pcworld.com/article/394951/pc-power-supply-ratings-80-plus-platinum-vs-gold-vs-bronze-vs-white-explained.html) power supplies. This can help minimize wasted energy and reduce the overall power consumption of the IoT device, thus lowering the device's carbon footprint.