Eneloop Pro by Panasonic. I bought a pack of 8 for interruption-free operation
However, I made some observations in the meanwhile:
- Frequent (smart home) requests have an impact on the battery life
- Alkaline batteries are more enduring (~20% longer operation)
- There’s an official power pack, which can be charged via USB-C. If I’d need to buy again, I’d choose this: https://www.idealo.de/preisvergleich/OffersOfProduct/201452597_-power-pack-nuki.html