How long do Chinese EV batteries actually last?
Updated 2026-05-186 min read
Battery longevity is the single biggest ownership concern for prospective EV buyers.
01
The chemistry
LFP (Lithium Iron Phosphate) — used in BYD Blade, CATL LFP packs. Very long cycle life, low fire risk, moderate energy density.
NCM (Nickel Cobalt Manganese) — used in NIO, Xpeng, Zeekr, Xiaomi long-range packs. Higher energy density, moderate cycle life.
02
Real-world data
Chinese taxi fleets show BYD Blade packs at 92%+ capacity after 200,000 km real-world.
NIO ET7 100 kWh NCM packs show 88–90% at 100,000 km.
03
Warranty commitments
BYD: 8yr / 160,000 km guarantee to 70% capacity.
Zeekr: 8yr / 200,000 km to 70%.
NIO: 8yr / 200,000 km to 70% (unlimited km on BaaS).
Key takeaways
- 01LFP packs designed for 1M+ km.
- 02NCM packs for 500–700k km before major degradation.
- 03Warranties typically 8yr / 160–200k km to 70% capacity.
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