Can I bring two 20000mAh power banks on a plane?

Doubling Down on Power: Traveling with Two 20,000mAh Power Banks

Staying connected is essential for many travelers, and power banks are a lifeline for our devices on the go. But with airline regulations surrounding batteries, it's understandable to have questions about what's permitted onboard. Specifically, can you bring two 20,000mAh power banks on a plane?

The short answer is generally yes. Most airlines adhere to regulations set by international aviation authorities, which focus on the power bank's watt-hour (Wh) rating rather than its milliampere-hour (mAh) rating. The typical limit for carry-on luggage is 100Wh per power bank.

A 20,000mAh power bank usually falls well below this 100Wh threshold. To calculate the watt-hours, you need to know the voltage (V) of the power bank, which is usually 3.7V for lithium-ion batteries. The formula is:

mAh * V / 1000 = Wh

So, for a 20,000mAh power bank with a 3.7V output:

20,000 * 3.7 / 1000 = 74Wh

This is comfortably within the 100Wh limit. Therefore, carrying two 20,000mAh power banks, totaling 148Wh, might seem like it exceeds the individual power bank limit. However, regulations often permit multiple power banks under 100Wh each in carry-on luggage.

While this general guideline applies in most cases, it's crucial to remember that airlines can have slightly different interpretations or specific regulations. Always check with your specific airline before your flight to confirm their current policies on power banks. This is especially important for international travel, as regulations can vary slightly between countries.

Furthermore, it's good practice to:

• Clearly mark the Wh rating on your power banks: This helps expedite the security screening process.
• Keep your power banks in your carry-on bag: Power banks are generally prohibited in checked luggage due to the potential fire risk.
• Avoid charging your power banks during the flight: Unless explicitly permitted by the airline, refrain from charging them onboard.

By following these guidelines and confirming the specific regulations with your airline, you can ensure a smooth journey with your power banks and stay connected throughout your travels.