The BYD Seal 08 brings a longer electric driving proposition to the premium plug-in hybrid conversation. A July 7, 2026 launch report from Electric Cars Report identifies the DM-i 400 km Flagship in the six-version Seal 08 range. The report describes up to 400 km of electric-only CLTC range for the plug-in hybrid, a 45.36 kWh battery and up to 1,660 km of combined range. BYD also maintains a dedicated official Seal 08 DM-i model page. [1, 2] This distinction matters for used listings: the DM-i is a plug-in hybrid, with both an engine and a rechargeable traction battery. The 400 km figure concerns electric-only operation under CLTC testing; it is not the combined range. Specifications from the Seal 08 EV or the DM-p all-wheel-drive version should remain attached to those separate variants. [1] What this means for used vehicle buyers For the used market, the model suggests a useful middle ground for drivers who can charge regularly but still want fuel-based flexibility on longer journeys. Whether that combination delivers value depends on the owner's actual driving pattern, access to charging and local energy costs. A longer advertised electric range does not by itself establish lower running costs. A credible used-car offer should document the condition of both power systems. Battery testing and charging operation belong beside engine service records, fluid checks and a road test covering electric and hybrid operation. Photographs of the instrument cluster and the original configuration record help a distant buyer understand exactly what is being offered. The commercial opportunity is to explain the ownership experience clearly: routine journeys can be planned around charging, while longer trips retain additional flexibility. Dealers should support that message with a condition report and a transparent service plan. As this relatively new model enters resale channels, each available vehicle will need individual assessment; the launch specification alone cannot establish its used value.