---
type: provision
id: lithium-ion-cell-b-3-i
asset: lithium-battery-shipping-limits
title: "(b)(3)(i) — Lithium battery shipping limits (49 CFR 173.185)"
sources:
  - https://www.ecfr.gov/current/title-49/section-173.185
source_quote: "( i ) The Watt-hour (Wh) rating may not exceed 20 Wh for a lithium ion cell or 100 Wh for a lithium ion battery. After December 31, 2015, each lithium ion battery subject to this provision must be marked with the Watt-hour rating on the outside case."
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-01-30
provision: "(b)(3)(i)"
applies_to: "lithium ion cell"
threshold: "20 Wh"
requirement: "The Watt-hour (Wh) rating may not exceed 20 Wh"
unverified_fields: provision
---
**Provision:** (b)(3)(i)

**Applies to:** lithium ion cell

**Threshold:** 20 Wh

**Requirement:** The Watt-hour (Wh) rating may not exceed 20 Wh

> ( i ) The Watt-hour (Wh) rating may not exceed 20 Wh for a lithium ion cell or 100 Wh for a lithium ion battery. After December 31, 2015, each lithium ion battery subject to this provision must be marked with the Watt-hour rating on the outside case.

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