# (5) — Lithium battery shipping limits (49 CFR 173.185)

For (5), applies to is each lithium ion battery; threshold is 0 Wh; requirement is each lithium ion battery must be marked with the Watt-hour rating on the outside case, recorded from its source on 2026-08-03.

- **Provision:** (5)
- **Applies to:** each lithium ion battery
- **Threshold:** 0 Wh _(unconfirmed — we could not tie this to the quote below)_
- **Requirement:** each lithium ion battery must be marked with the Watt-hour rating on the outside case.

## What the source says

> ( 5 ) Beginning May 10, 2024, each lithium ion battery must be marked with the Watt-hour rating on the outside case.

## Source

- https://www.ecfr.gov/current/title-49/section-173.185

Last verified: 2026-08-03. Review by: 2027-01-30.
Part of [Lithium battery shipping limits (49 CFR 173.185)](https://referencesource.org/lithium-battery-shipping-limits/).