---

title: "Battery warranties: years, cycles and throughput explained" description: "How to read a battery warranty and compare brands on what actually matters." lastUpdated: "27 Feb 2026"

Battery warranties (decoded)

Most modern home batteries quote 10 years. The fine print usually adds more:

• A throughput cap, measured as total kWh over the term.
• Conditions on temperature, state of charge and charge rates.
• A stated end-of-warranty capacity, often 60–70% of the original.

Read the years and the throughput cap together. A long warranty with a small throughput cap can be less generous than it first looks.