BYD Seal Shows Only 5% Battery Degradation After Two Years, Drawing Attention for Range Performance

The 2024 single-motor BYD Seal was tested in the inaugural episode of InsideEVs’ “Battery Degradation Log” series. The vehicle had accumulated 31,000 miles (approximately 50,000 km) and is equipped with an 82.56 kWh usable capacity lithium iron phosphate (LFP) Blade Battery, with a total capacity of around 85 kWh and an official WLTP range rating of 354 miles (570 km). According to real-world testing by the Australian YouTube channel BeyondEV, after two years of use, the battery retained 95.08% health, corresponding to a remaining capacity of approximately 78.5 kWh. InsideEVs noted that this result remains informative even without detailed knowledge of specific charging habits or parking conditions that could influence degradation. As indicated by relevant research published in the Journal of Power Sources, lithium-ion battery degradation typically follows a nonlinear pattern—meaning that a 5% loss over the first two years does not imply a continued linear decline at the same rate thereafter.