VARTA Power on Demand 9V Block (10-pack - smart, flexible and powerful, for mobile end devices - e.g. for Smart Home devices, smoke detectors, fire alarms)

Really really good value for money. I bought this big pack after testing a smaller pack out. They last absolutely ages with a cat who likes to graze and has his automatic feeder opening and closing about 50 times a day. I get double the length of use out of these with my grazing cat compared to other well known brands, and with my other cat who uses his feeder a bit less throughout the day, we have the same batteries in there well over a year later so I'm really happy. They function much better than other brands!

Minimal packaging waste. Good price for the 40 pack of batteries which are good quality and last well. These are much better than the cheap batteries you buy in budget supermarkets. They last much longer and end up being much better batteries. Good quality batteries. I will buy again.

Not as good as Duracell but cheaper.

Absolute value for money: battery life is far superior to more well known & advertised brands - so they function well. Last for ages in various tech controls, a torch and smaller kitchen electricals. Used to buy these in various DIY stores but they disappeared. Thanks to Amazon for selling these :)

Like this German brand of battery compared to its more expensive rivals

Excellent quality batteries which last well and are very reasonably priced compared to other brands. Have bought multiple different sizes and all are equally as good.

Batteries work as you would expect.

I have ordered these batteries again because I was impressed on how long they last and value for money. They last a very long time in low power items like remote controls for TV's. They last in excess of 5 hours in an Xbox One wireless controller and a long time in a drone remote control. The batteries came securely packaged and in flat packets of 10 which makes them easy to store.