4x 18650 Charging Station w/ 5v1a Single Cell Lipo Chargers

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<h2>Summary</h2> A compact 4-bay charging station allows users to monitor individual battery cell voltages when power is off. Each 18650 battery can be checked separately by pressing the corresponding button. <h2>Required Components</h2> <ul> <li>(4x) Single-cell LiPo chargers (4V1A)</li> <li>(4x) Battery cases with spring and terminal wires</li> <li>(4x) Momentary Switch Buttons</li> <li>(1x) Voltmeter</li> <li>(10x) M2x6mm Screws</li> <li>(8x) M2 Nuts</li> <li>Double-sided foam tape</li> <li>26-gauge silicon wire</li> <li>Power terminal (XT60)</li> </ul> <h2>Possible Additional Components</h2> <ul> <li>Voltage Step-down Module</li> <li>Toggle Switch</li> </ul> <h1>Assembly Instructions</h1> <ul> <li>Remove spring and terminal wires from battery cases.</li> <li>Attach these wires to 18650 battery bays.</li> <li>Route wires into charging module bay.</li> <li>Cable two sets of -&+ wires from buttons bay to each charging bay.</li> <li>Solder spring and terminal wires, along with one set of button cables, to BATT -&+ respectively.</li> <li>Solder remaining button cable pairs to 5V source on charging modules.</li> <li>Join all - wires from BATT -, voltmeter, and 5V source together.</li> <li>Solder source + to + source for charging modules.</li> <li>Solder each BATT + to one side of the push button.</li> <li>Solder other push button sides and white voltmeter cables together.</li> <li>Optionally add toggle switch to break circuit via 5V source.</li> <li>Secure charging modules with double-sided foam tape on printed standoffs.</li> </ul> <h2>Important Notes</h2> Ensure a power supply capable of delivering 4 amps at 5V is used. A voltage step-down module can be added to convert 24V PS to 5V. The user can obtain voltages from each cell by powering off the unit and pressing buttons individually or simultaneously for combined readings.