Check your power bank before flying from Nigeria
Read the battery label and confirm the operating airline rules before packing.
Power banks belong in cabin baggage, not checked bags. Confirm the current capacity, quantity, storage and use rules with every operating airline; a calculation does not grant carriage permission.
Check my power bankWhat does your label say?
Use the printed Wh number when available. It is the figure airlines use.
The printed Wh rating takes priority over a generic conversion.
Read the label correctly
mAh ÷ 1,000 × nominal V = WhStart with the Wh printed on the pack. The examples below use a typical 3.7V battery only when a conversion is needed.
Comparison table
| Example label | Calculation | Result |
|---|---|---|
| 20,000 mAh at 3.7 V | 20,000 ÷ 1,000 × 3.7 | 74 Wh |
| 10,000 mAh at 3.85 V | 10,000 ÷ 1,000 × 3.85 | 38.5 Wh |
Airline and national rules can be stricter than this international starting point. Check the operating airline for every leg before travel.
Check the label and the operating airline before you leave.
Keep the power bank in cabin baggage, protect it from short circuits and never assume one airline’s policy applies to the next.
Open Power Bank Finder →What does this mean
for your choice?
Convert with the internal battery voltage
Wh equals mAh divided by 1,000 and multiplied by nominal battery voltage. USB output voltage is not necessarily battery voltage. If the label is missing or unclear, obtain the manufacturer specification and ask the airline before travelling.
Capacity is only one check
Check the rules for your exact flight, the number of packs, permitted storage and in-flight use. Inspect for damage or swelling and protect exposed terminals. Follow airline and crew instructions; do not assume that a seat USB port permits charging a power bank.
Check the pack, the bag and the airline.
The international Wh bands are only the starting point. The operating airline can set a stricter quantity, use or storage rule.
- Legible Wh and exact model label
- Every operating airline checked
- Cabin packing and protected terminals
- No damage, swelling or applicable recall
Practical answers
Does 20,000 mAh guarantee acceptance?
No. Voltage is needed to determine Wh, and airline conditions still apply.
Evidence and sources2 official sourcesShow sources
Separate documented specifications from calculated matches.
Products shows source-region technical references. No Nigerian model has yet passed the exact-variant and photograph checks for calculated recommendations. A calculated match is not a compatibility guarantee or a purchase recommendation. Enter your actual device load and check its connections and instructions.