Before committing to large orders, buyers should conduct rigorous sample testing using this protocol:Equipment: Use a battery analyzer with 4-wire measurement, thermal camera/thermocouples, calibrated IR meter (AC 1 kHz and/or DC method), precision scale, calipers, and safety fixtures.Capacity Test: Fully charge cells per the datasheet, rest for 60–120 minutes, then discharge at 0.2C to the...