score:4
Probably, but with care
Although the EU security regulations don't prohibit spare batteries, there are separate safety restrictions. IATA regulations state that:
In all cases, each battery must either be in a separate plastic bag, or have its terminals covered to prevent a short circuit.
The British CAA guidelines for example are a little more restrictive, requiring airline approval for anything between 100-160Wh. Not sure whether any EU member states have similarly strict guidelines.
For comparison, a laptop battery is typically less than 100Wh
Upvote:3
Yes, you can. There is the list of prohibited objects in hand luggage according to EU regulations. As batteries are not listed you can carry them without further trouble.