Short answer: For most trips, 10,000mAh is the sweet spot: light enough to forget, enough for a day and a half. Take 20,000mAh for long trips or several devices. If you fly, keep it under 100Wh (about 27,000mAh), keep it in your cabin bag, and do not use it on board.
What to look for in a travel power bank
1. Capacity and weight
More capacity means more weight. Choose for the trip, not the biggest number.
| Trip | Capacity | Approx. Wh | Weight (alain example) |
|---|---|---|---|
| Day trip, commute | 5,000mAh | 18.5Wh | Pocket Charge 88g |
| Weekend trip | 10,000mAh | 37Wh | PowerFlex 10,000mAh 219g |
| Long trip, several devices | 20,000mAh | 74Wh | See the product page |
In real use, 10,000mAh gives roughly one and a half full charges for a typical phone, and 20,000mAh roughly three. This is an estimate. It depends on your phone's battery size and on conversion losses.
2. Flight rules
This is where travel power banks differ from everyday ones. Under India's DGCA advisory, a power bank must go in cabin baggage only, and using it on board is banned. IATA's passenger guidance limits you to two power banks of 100Wh or less each. Full details: Can you carry a power bank on a flight in India?
3. Built-in cable or magnetic tips
A forgotten cable ruins a trip. The PowerFlex has built-in cables. The Pocket Charge has magnetic tips.
4. A wall plug
If you often need a charger too, a power bank with a built-in plug saves space.
5. Safety
Look for a BIS registration number on the label and basic protections (overcharge, short-circuit, temperature).
alain picks for travel
| Situation | Pick | Why | Note |
|---|---|---|---|
| Light day trips | Pocket Charge (88g, ₹1,399) | Smallest, no cable to carry | 5,000mAh is one top-up |
| Weekend and long trips | PowerFlex (from ₹1,349) | Built-in USB-C and Lightning cables | 20,000mAh is also under the flight limit |
| One device for charger and power bank | TravelMate (₹2,499, 320g) | 10,000mAh, 25W wireless, 20W USB-C wired, foldable wall pins | Check that the built-in pin type matches the sockets in the country you visit |
| iPhone users who want slim | Air Mag (9mm) or Magon (10,000mAh) | Magnetic, no cable needed for wireless charging | |
| Camping or power cuts | SolRover | Solar panel for emergency top-ups | The solar panel is an emergency top-up, not a main charger |
| Not for flying | LumoPower (30,000mAh, about 111Wh) | Charges laptops | Over the 100Wh flight limit |
Common mistakes
- Putting the power bank in checked baggage.
- Buying the biggest capacity and then not carrying it.
- Using it on board.
- Forgetting the cable.
Frequently asked questions
What capacity power bank is best for travel?
10,000mAh suits most trips. 20,000mAh suits long trips or several devices.
Can I take a 20,000mAh power bank on a plane?
Usually yes. It is about 74Wh, under the 100Wh limit. Keep it in cabin baggage.
Can I take a 30,000mAh power bank on a plane?
Plan on no. It is about 111Wh, above the 100Wh limit.
Can I use my power bank during the flight?
No. India's DGCA advisory bans using a power bank in flight.
Do I need a different power bank for international travel?
The same rules apply on most airlines. Check the airline's own policy, because some airlines add their own limits.
Related reading
- Can you carry a power bank on a flight in India?
- Best power banks under ₹2000
- How long does a power bank last?
- Shop all power banks
Last reviewed: 5 October 2026. Airline rules change, so confirm with your airline before you fly.