Why does the car often fail to unlock or start after changing the battery?

Why does the smart key sometimes fail? Is it because the battery is dead or something else?

My Previa's remote key won't unlock the doors, even after changing the battery. What's going on? Fellow car owners, can you please advise on how to fix this? Thanks a lot!

Why does the keyless entry only lock but not unlock the car?

Hey folks, I need some advice. I just changed my car battery, and the starting power seems strong. But why does it show low battery voltage as soon as I turn off the engine? Even after driving 100 kilometers, it still reports this issue. What's the reason?

I bought the car in August 2020, and now it often won't start. Is the battery drained?

Why is my car often sluggish when starting, as if it takes a long time to start up?

Does your car battery often run out of charge?

Why can't I shift gears often after starting my new Defender 130?

Why does the car often fail to unlock or start after changing the battery?

Why does the car sometimes not respond when starting, even though the battery and dashboard lights are normal?