I've had many Duracell batteries leak and ruin various devices,
Never had a rechargable battery leak.

I have used off brand batteries in everything from cameras to power tools.
The results have been very good.
If they don't last as long or have a shorter life, you can buy several for the price of an OEM battery

My wife and I have made three Viking cruises, including the Danube trip.
There is a lot of walking......

I bring a Nikon "Coolpix" L120. It is small and light.
Our purpose is to enjoy the trip, photos are secondary.

The one issue is identifying the various locations......The streets of all those small river towns look alike, the same with the interior of the Cathedrals.

My wife uses her phone, with GPS, to mark locations. After the trip I use her data to identify locations for my photos.

It is a great trip, Viking is terriffic!.....enjoy...