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I have bought one battery backup/energizer/secondary power source (2500 mAh). I am going to India this week but not sure whether I can carry battery backup on flight. The website of Air Canada does not specify whether a battery backup is allowed on flight.

To make it more clear for you I have attached the images:

Battery Backup Battery Backup

pnuts
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Kunal Sonone
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    What is a "battery energizer"? Around here "Energizer" is a brand name for non-rechargeable batteries. Do you mean a charger for rechargeable batteries? Or (guessing wildly) an UPS? – hmakholm left over Monica Mar 21 '16 at 17:31
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    It is like a battery backup which you can use to charge your mobile or tablet. – Kunal Sonone Mar 21 '16 at 18:01
  • You can charge it using the mobile charger and use it during long traveling for your mobile/tab charging. – Kunal Sonone Mar 21 '16 at 18:03
  • What kind of battery is in it? If it's a lithium battery, most airlines have rules based on the capacity in Wh -- your measurement in mAh doesn't immediately make sense in this context, unless accompanied by a voltage specification. – hmakholm left over Monica Mar 21 '16 at 18:15
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    The output voltage by device is 5 volt 1 A and 5V/2.1A. It has Li-ion polymer cell. – Kunal Sonone Mar 21 '16 at 18:31
  • Some countries/airports only seem to allow the batteries if they have their power as part of the information that is on the item. – Willeke Mar 21 '16 at 18:38
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    These items are sold at the tax free shops in airports, so you would not expect problems. – Count Iblis Mar 21 '16 at 20:25
  • See also: How to calculate if my battery will be allowed in hand luggage? (Voltage in mAh to Wh conversion). Can't believe this was closed as "unclear", that's ridiculous. Duplicate, maybe, but it's perfectly clear. 2,500 mAh is pretty small, I've travelled with 26,000 mAh bricks the size of a paperback novel and no-one has batted an eye, you'll almost certainly be fine. – user56reinstatemonica8 Mar 22 '16 at 10:17
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    Except it was closed 4 hours after the asker explained what these are using comments, two hours after a commenter had pointed out that these well-known items are commonly sold in airports, and an hour after Howdedo had linked to the duplicate. It's not "the community did not understand", it's a small harmful minority of up to five users failing to read comments. – user56reinstatemonica8 Mar 22 '16 at 14:49
  • @user568458 Comments are and always have been temporary, and it's perfectly valid for people to skip them. Indeed, some methods of viewing the site do not show the comments at all! Nothing relevant should only be in a comment; everything should be edited in to the question. – Michael Hampton Mar 22 '16 at 17:20

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