If you have a battery that needs a stable voltage output, then this module fits your requirements best. This module keeps your desired voltage even with the lower or higher input voltage. You would need at least 3.5V up to 28V input voltage for this module to work. The output is controllable using a potentiometer from 1.25V to 26V. It also has screw holes so that mounting won't be a problem. The combination of LM2596 (Step-up converter) and LM2577 (Step-down converter) makes this a one of a kind Buck-Boost Converter module.

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