Thailand mAh cap

Thailand 20000mAh power bank flight rule

Last reviewed: May 28, 2026
Ruleset: 2026-05-15
Reviewed by: CertiWatt source integrity workflow

Short answer: Thailand can apply a 20,000 mAh power-bank cap. That means a model over 20,000 mAh can be restricted even when it is below the common 100 Wh threshold.

Thailand is a strong example of why Wh alone is not always enough. Some guidance can look directly at the printed mAh capacity.

A 20,000 mAh battery at 3.7 V is about 74 Wh, so it is normally below 100 Wh. The Thailand issue is the separate mAh cap, especially for 24,000 mAh, 25,000 mAh, 26,800 mAh, and 30,000 mAh products.

CertiWatt applies this as a trip-specific overlay for Thailand departure or transit contexts, then combines it with carry-on, recall, airline, and Wh rules.

Rule summary

Applies to: Thailand departure or transit contexts.
Capacity cap: 20,000 mAh under current CAAT guidance.
Example: 24,000 mAh Anker 737 can be restricted despite being under 100 Wh.
Carry-on: Power banks remain carry-on only.

Check your device

The final answer can change by model, airline, country, certification mark, label evidence, and recall status.

Check a Thailand power-bank trip

FAQ

Is 20,000 mAh allowed in Thailand?

A 20,000 mAh model may be allowed if other conditions are satisfied, but the label should be clear and the trip should be checked.

Is 24,000 mAh allowed in Thailand?

It can be restricted because it is above the 20,000 mAh cap, even if the Wh value is below 100.

Does Thailand use Wh or mAh?

Both can matter. The Thailand overlay can use mAh, while global aviation battery limits use Wh.

Does the Thailand rule apply globally?

No. CertiWatt applies it to Thailand-relevant trips.

Sources and evidence

This guide is reviewed against CertiWatt ruleset 2026-05-15. Active rule citations pass the source integrity release gate before deployment; trip-specific verdicts can still cite additional regulator, airline, manufacturer, or recall sources.

Informational only. Final decision rests with airline and security staff. Why we said this.