Reversing Entropy · video

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Paulo subjects a free Vatrer 12-volt LiFePO4 battery to five destructive tests to evaluate its built-in battery management system. The first test pulls 160 amps through a 4,000-watt inverter and two resistive heaters — well above the battery's 100-amp rated maximum — triggering an over-current shutdown followed by automatic recovery.5:48 A direct short-circuit test produces the same result: the BMS cuts output and resets itself.7:24 A full discharge test runs the battery to zero through an inverter and then a direct-connected pump, confirming the cells reach true depletion.8:56 The battery then spends a night in a freezer, reaching negative 8.7°C (16°F); a 5.8-amp charger is connected while it remains frozen, and the battery's internal heater brings cell temperature to 15°C before allowing charge current to flow — the threshold for sub-10-amp charging.11:34 The final test applies 24.8 volts from two series-connected lead-acid batteries to simulate a runaway solar charger; the Vatrer battery absorbs up to 75 amps without tripping.15:08 The battery survives all five tests with no permanent damage, and Paulo concludes its BMS handles over-current, short-circuit, deep discharge, sub-zero charging, and over-voltage conditions without manual intervention.16:50

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