# Small consumer-type lithium-ion batteries in equipment (up to 20 Wh per cell, 100 Wh per battery) — Postal shipping restrictions by item category

For Small consumer-type lithium-ion batteries in equipment (up to 20 Wh per cell, 100 Wh per battery), carrier is USPS; restriction type is restricted; scope is domestic mail via air and surface transportation; conditions is Mailable via air and surface; cells not to exceed 20 Wh, batteries not to exceed 100 Wh; up to 8 cells or 2 batteries per mailpiece; must display DOT-approved lithium battery mark, recorded from its source on 2026-08-04.

- **Item category:** Small consumer-type lithium-ion batteries in equipment (up to 20 Wh per cell, 100 Wh per battery) _(unconfirmed — we could not tie this to the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** domestic mail via air and surface transportation _(our reading, not quoted from the source)_
- **Conditions:** Mailable via air and surface; cells not to exceed 20 Wh, batteries not to exceed 100 Wh; up to 8 cells or 2 batteries per mailpiece; must display DOT-approved lithium battery mark _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Small consumer-type lithium-ion cells and batteries (also called secondary lithium cells or batteries), such as those used to power cell phones and laptop computers, are only mailable domestically under the following conditions.

## Source

- https://pe.usps.com/text/pub52/pub52c3_028.htm

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).