I am travelling from Vilna to Stockholm with AirBaltic, in Europe. I am wondering if you can carry the batteries in the hand luggage.
Lithium ion and lead acid batteries are the ones airlines concerned about. The latter contain corrosive liquid. The former can overheat and light on fire, and airlines don't want them in the cargo hold if that happens (they can react much more quickly if it happens in the passenger compartment).
The batteries you're showing are likely nickel metal hydride (or possibly nickel cadmium). These are safe and shouldn't be a problem on any airline.