Engineers Pulled BYD's Blade Battery Apart — What They Found Isn't What Aussies Expect

📕 My honest car, ute & 4WD guides — buy the right one, then keep it alive 👉 https://aussiemechanicgreg.com One hundred and fourteen cells, glued in so hard it took three days and a circular saw to get them out. That's what came out of a BYD Shark's battery pack when Munro & Associates cut it open. And a German university found something inside the cell itself that most people have backwards. Under my last video you asked the right question: what will these be like in five, ten or fifteen years, and what happens to the battery when it's finished? I didn't do either teardown and I say so up front. This is what the two teams found, how long the battery is likely to last, what BYD's warranty actually promises, and the four checks I'd do before buying a used one. What I cover: - Inside the Shark's own pack (Munro): 114 lithium iron phosphate cells, 365 volts, 81 amp-hours, sealed fasteners, a heater grid, and the glue - The surprise on the lid: it's cooled from the TOP, with air-conditioning refrigerant, and why that makes your aircon part of the battery - Inside the cell (RWTH Aachen): heavier than Tesla's for the same energy, but half the heat per volume, and why heat is what kills batteries - How long it lasts: BYD's 3,000-cycle claim, the plug-in hybrid arithmetic, and what 22,700 real EVs show about capacity loss - The warranty fine print: 8 years or 160,000km, to 70% capacity, and why a bush ute runs out of battery warranty in about five and a half years - End of life: why this chemistry is hard to make pay for recycling, and why a second life as home or farm storage makes more sense - The four checks before you buy a used one, starting with the battery health reading in writing FACT-CHECK: Munro & Associates' Shark battery teardown (Munro Live, "Shark Attack! Breaking Down BYD's Battery Pack", presented by VP of Technology Al Steier) reported a refrigerant-cooled pack with cooling channels in the top cover, an electric heating grid on the cells, perimeter and centre sealing adhesive, individually encapsulated fasteners, 114 lithium iron phosphate Blade cells in two modules of 57, about 30 kWh, 365V DC and 81Ah, cells glued in and removed over three days by cutting the pack box, laser-welded busbars, and a BMS board connected to the cells by tabs. BYD quotes 29.58 kWh for the Shark 6. RWTH Aachen University's PEM chair published a teardown comparing a BYD Blade cell with a Tesla 4680 cell in Cell Reports Physical Science (6 March 2025): 160 Wh/kg and 355 Wh/l for the Blade against 241 Wh/kg and 643 Wh/l for the 4680, half the energy losses per volume at the same C-rate, graphite anodes with no silicon, stacked electrodes; the study did not measure lifespan, and the cell studied is a Blade LFP cell, not specifically the Shark's. BYD claims the Blade exceeds 3,000 charge cycles, quoted as about 1.2 million km. Geotab's study of 22,700+ EVs reported average capacity loss of 2.3% a year, up to about 3% for heavy DC fast charging above 100 kW and about 1.5% for mostly AC charging; figures are fleet averages, not Shark data. The Shark 6 is rated at 85 km WLTP electric range with DC charging up to 55 kW. BYD Australia's power battery and drive unit warranty is 8 years or 160,000 km, whichever comes first, with at least 70% capacity retained. LFP contains no nickel or cobalt; published research finds second-life reuse is generally more economical than recycling for this chemistry. No published Australian price exists for a replacement Shark 6 pack. Figures are indicative and vary. DISCLAIMER: General information and my honest opinion — NOT purchasing, mechanical, insurance or legal advice. No manufacturer, dealer or repairer named here is accused of any wrongdoing, and nothing here is a claim that any vehicle or battery is unsafe or will fail. Battery life depends on use, climate and charging. Confirm warranty terms with the manufacturer, ask a dealer for a battery health report in writing, and have a qualified mechanic carry out a pre-purchase inspection and a PPSR check before you buy anything.