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QuantumScape Achieves 1,000-Cycle Milestone for Solid-State Batteries

By James Liu · 4 min read · March 27, 2026
The battery startup has demonstrated 1,000 charge cycles with less than 10% degradation, bringing solid-state EV batteries closer to commercial viability.
QuantumScape Achieves 1,000-Cycle Milestone for Solid-State Batteries

QuantumScape Corporation (NYSE: QS) announced today that its latest solid-state lithium-metal battery cells have achieved over 1,000 charge-discharge cycles while retaining more than 90% of their original capacity.

What this means for EVs: - 1,000 cycles ≈ 300,000+ miles of driving range - Charging from 10-80% in under 15 minutes - No risk of thermal runaway (fire) unlike lithium-ion

Industry context: Traditional lithium-ion batteries typically show 20-30% degradation at 1,000 cycles. QuantumScape's result could fundamentally change the EV economics equation.

Our take: Solid-state batteries have been "5 years away" for a decade. This milestone is different — it's repeatable, independently verified, and happening at a scale that matters. If QuantumScape can hit volume production by 2028 as planned, every EV maker will want in.

Tags: EVBatteriesQuantumScape