24x New In Case Headway 38120 HP 3.2V 8AH Lifepo4 - $10/Cell

24x New Headway 38120 HP 3.2V 8Ah LiFePO4 Cells (In Original Case) $240.00 These are brand new Headway 38120 HP LiFePO4 cells, supplied in their original factory cases. Each case contains 24 cells (3 inner boxes of 8 cells each). All boxes feature recent production dates. Priced at just $10 per cell. What's Included 24 × Brand new Headway 38120 HP 3.2V 8Ah LiFePO4 cells M6-1.0 bolts (one set per cell for terminal connections) Original factory case with 3 inner boxes of 8 cells each Key Features Popular high-discharge cylindrical LiFePO4 cells, widely used in car audio systems and other high-power applications requiring compact size and substantial output. Rated for 120A continuous discharge (15C) and 240A pulse discharge (30C). Supports 80A continuous charge (10C). Delivers impressive power in a small form factor. Cell Specifications Nominal Voltage: 3.2V Chemistry: LiFePO4 Full Charge Voltage: 3.65V Full Discharge Voltage: 2.5V Capacity: 8Ah Max Continuous Charge: 80A Max Continuous Discharge: 120A Assembly Notes These cells use M6-1.0 terminals. The included 8mm bolts are suitable for busbars up to 1/8" thick. For thicker busbars, longer M6-1.0 bolts (approximately 1/4" longer than the busbar thickness) may be required. Important: Over-tightening can damage the cells. If using a torque wrench, set it to no more than 3–4 Nm. We also offer compatible cell holders, additional M6 bolts, 100A busbars, and BMS units in our accessories section. Safety Information These cells are capable of delivering very high current. Proper handling is essential. Always use a compatible BMS, cell holders or insulation between cells, appropriately sized busbars, and stay within the specified voltage and current limits. We are not responsible for damage caused by over-tightening, over-charging, over-discharging, short circuits, or improper assembly. Every cell is factory-tested and arrives in new condition. body { font-family: Arial, sans-serif; background-color: #f0f0f0; margin: 0; padding: 20px; } .info, .form-section { background-color: #ffffff; padding: 15px; margin-bottom: 20px; border-radius: 5px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); } .info h2, .form-section h1 { margin-top: 0; color: #0056b3; } label { display: block; margin-bottom: 5px; font-size: 0.9em; color: #333; } input[type="number"] { width: 100%; padding: 8px; margin-bottom: 10px; border-radius: 4px; border: 1px solid #ccc; font-size: 0.9em; } input[type="submit"], select { background-color: #0078d7; color: white; border: none; padding: 10px 20px; border-radius: 4px; cursor: pointer; font-size: 0.9em; } input[type="submit"]:hover { background-color: #0056b3; } Cell Specifications Nominal Voltage: 3.2vChemistry: LiFeP04Full Charge Voltage: 3.65vFull Discharge Voltage: 2.5vCapacity: 8AhMax Continuous Charge: 80AMax Continuous Discharge: 120A Calculate Your Battery Pack Desired Total Voltage (V): Desired Power: Watts (W) Kilowatts (kW) Desired Energy: Watt-hours (Wh) Kilowatt-hours (kWh) function detectBatteryChemistry(nominalVoltage) { if (nominalVoltage >= 3.6 && nominalVoltage <= 3.8) { return {chemistry: "Lithium Ion", fullChargeVoltage: 4.2, fullDischargeVoltage: 2.8}; } else if (nominalVoltage >= 3.2 && nominalVoltage <= 3.3) { return {chemistry: "LiFePO4", fullChargeVoltage: 3.65, fullDischargeVoltage: 2.5}; } else if (nominalVoltage === 2.2) { return {chemistry: "LTO", fullChargeVoltage: 2.8, fullDischargeVoltage: 1.5}; } else if (nominalVoltage === 3.0) { return {chemistry: "Sodium Ion", fullChargeVoltage: 4.0, fullDischargeVoltage: 2.0}; } else { return {chemistry: "Unknown", fullChargeVoltage: nominalVoltage, fullDischargeVoltage: nominalVoltage}; } } function formatCapacity(capacity) { var capacityInAh = capacity / 1000; if (capacityInAh % 1 === 0) { return capacityInAh.toString() + " Ah"; } else { return capacityInAh.toFixed(1) + " Ah"; } } function initialize() { var nominalVoltage = parseFloat(document.getElementById('nominalVoltage').value); var capacity = parseFloat(document.getElementById('capacity').value); var maxCharge = parseFloat(document.getElementById('maxCharge').value); var maxDischarge = parseFloat(document.getElementById('maxDischarge').value); var batteryDetails = detectBatteryChemistry(nominalVoltage); document.getElementById('cellVoltage').textContent = nominalVoltage + "V"; document.getElementById('cellChemistry').textContent = batteryDetails.chemistry; document.getElementById('cellFullChargeVoltage').textContent = batteryDetails.fullChargeVoltage + "V"; document.getElementById('cellFullDischargeVoltage').textContent = batteryDetails.fullDischargeVoltage + "V"; document.getElementById('cellCapacity').textContent = formatCapacity(capacity); document.getElementById('cellMaxCharge').textContent = maxCharge.toString(); document.getElementById('cellMaxDischarge').textContent = maxDischarge.toString(); } function calculatePackConfiguration() { var nominalVoltage = parseFloat(document.getElementById('nominalVoltage').value); var capacity = parseFloat(document.getElementById('capacity').value); var maxCharge = parseFloat(document.getElementById('maxCharge').value); var maxDischarge = parseFloat(document.getElementById('maxDischarge').value); var desiredVoltage = parseFloat(document.getElementById('desiredVoltage').value); var powerUnit = document.getElementById('powerUnit').value; var desiredWatts = parseFloat(document.getElementById('desiredWatts').value); if (powerUnit === "kW") { desiredWatts *= 1000; } var energyUnit = document.getElementById('energyUnit').value; var desiredWattHours = parseFloat(document.getElementById('desiredWattHours').value); if (energyUnit === "kWh") { desiredWattHours *= 1000; } var cellsInSeries = Math.ceil(desiredVoltage / nominalVoltage); var wattCellsInParallel = Math.ceil(desiredWatts / (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullDischargeVoltage * maxDischarge)); var energyCellsInParallel = Math.ceil((desiredWattHours / (cellsInSeries * nominalVoltage)) / (capacity / 1000)); var cellsInParallel = Math.max(wattCellsInParallel, energyCellsInParallel); var totalCells = cellsInSeries * cellsInParallel; var totalAmpHours = (capacity / 1000) * cellsInParallel; var totalKWh = (totalAmpHours * (cellsInSeries * nominalVoltage)) / 1000; var maxChargeCurrent = cellsInParallel * maxCharge; document.getElementById('result').innerHTML = "Pack Configuration: " + cellsInSeries + "s" + cellsInParallel + "p" + "Total Cells Needed: " + totalCells + "" + "Nominal Voltage: " + (cellsInSeries * nominalVoltage).toFixed(2) + "V" + "Amp Hours of the Pack: " + totalAmpHours.toFixed(2) + "Ah" + "kWh of the Pack: " + totalKWh.toFixed(2) + "kWh" + "Fully Charged Voltage: " + (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullChargeVoltage).toFixed(2) + "V" + "Fully Discharged Voltage: " + (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullDischargeVoltage).toFixed(2) + "V" + "Max Continuous Charge Current: " + maxChargeCurrent.toFixed(2) + "A" + "Max Continuous Discharge Current: " + ((desiredWatts / (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullDischargeVoltage)).toFixed(2)) + "A"; } window.onload = initialize; This calculation also takes into consideration the maximum continuous amp ratings of the cells. If you over tighten your bolts it could damage the cell. If you have a torque wrench set it to 3nm. Do not tighten over 4nm. We are not responsible for user error. Every cell is factory tested and in new condition. If you over charge/discharge, over torque the connections, or cause a short we will not replace the cells once they are handled and assembled into a pack. Always use a BMS, cell holders or insulation between the cells, proper size busbars to carry the current, stay within the voltage/amps of the cells, and take necessary safety precautions.