DC-DC Buck Converter 36V to 5V 5A - High-V Step-Down multi bit if you do have a

if you do have a battery

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DC-DC Boost Converter

the module can save the data when the main power is shut down accidentally

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DC-DC Buck Converter 36V to 5V 5A - High-V Step-Down multi bit if you do have aThis converter is easy to use. It has a DC plug and an USB out. It can cover voltage from 9V to 36V and create an output to 5V. QUICK SPECS: Input voltage: DC 9V 36V; Output voltage: 5. 2V 5A 25W Output capability: 9 ~ 24V Input: Output 5. 2V 6A 30W 24 ~ 32V Input: Output 5. 2V 5A 25W 32 ~ 36V Input: Output 5. 2V 3. 5A 18W Dimension: 63 x 27 x 10mm (L * W * H)