I've replaced the batteries in my keys but the car still says low battery

I have replaced my key fob batteries on a couple of occasions but it still indicates that the battery is low. Am i missing something here that i should do after installing new batteries?

Are flat batteries on hybrids left parked a common problem?

I have a 2024 Nissan Qashqai e-Power which I left at the airport for 2 weeks. When we got back my car battery was flat. Is this common on self charging hybrid cars or just Nissan? And why put such a small...

What solar battery trickle charger do you recommend?

As I will only be doing short infrequent journeys should I buy a solar battery trickle charger. If so which is best and easiest to connect please. Possibly not connecting to the battery terminals. Will...

Should I use a battery conditioner if I don't drive my car much over winter?

I have recently bought a 2014 Ford Fiesta 1.0 Ecoboost - my first car with a stop/start engine and battery system. In the winter, I use the car very little and would like to top up the battery using my...