Some more information here, the warranty does not cover accidental damage or a fault developed after exposure to water. The battery though only has 12 months warranty Yes for every Samsung Device in Uk https://www.samsung.com/uk/support/mobile-devices/what-is-the-warranty-status-of-my-samsung-mobile-d... The difference between the warranty and Samsung care Plus which is an an additional cost (though 1 years free currently offered with Z Fold 3/Z Flip3) https://www.samsung.com/uk/offer/samsung-care-plus/ However Samsung Care Plus must be taken out within 6 months of purchase.There are alternatives but protection varies https://www.money.co.uk/mobile-phone-insurance/samsung-galaxy-insurance.htm
When out of warranty and cover the relevant fees apply which in some cases will be quite expensive.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .