Where to buy additional batteries?

[peter_pilot]

Hello,

I have just bought the Tello for my 7 year old and we would like to buy additional batteries to extend our flight times.

These are the suppliers that I found:

Ebay sells them for £21.00 (link)
Amazon sells them for £19.00 (link)
Aliexpress sells them for £13.61 (link)

Is there any reason why I wouldn't buy from lowest bidder? (Aliexpress) i.e. Does battery quality vary?
Are there other suppliers that I should consider?

Thanks!

 

[Hacky]

The eBay offer contains a double pack, so its 21.00 each.

For the Aliexpress, I get "Page not found". I don't know details for UK, but there may be additional fees and extra waiting time. As long as the show the "Fullymax" label, they seem to be the same as those coming together with Tello in the original package.

 

[peter_pilot]

The eBay offer contains a double pack, so its 21.00 each.

For the Aliexpress, I get "Page not found". I don't know details for UK, but there may be additional fees and extra waiting time. As long as the show the "Fullymax" label, they seem to be the same as those coming together with Tello in the original package.

Thanks - corrected the price and I'll look for the Fullymax label.
The Aliexpress link works for me, maybe it is regionally dependent?