Can I Bring Lithium Batteries (100 Watt Hours or Less) on a Plane to United Kingdom?
Lithium Batteries (100 Watt Hours or Less)
Restrictions Apply
Special Rules Apply
According to CAA guidelines, spare/loose batteries (including power banks) must be in carry-on only. Batteries installed in devices allowed in both. Lithium metal max 2g, lithium ion max 100Wh.
The final decision rests with the CAA officer on whether an item is allowed through the checkpoint. Official CAA Rules →
Quick Rule
Under 100Wh
No approval needed
100Wh - 160Wh
Airline approval required
Over 160Wh
Not allowed
Source: Official CAA Regulations ↗Updated: May 20, 2026
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