"XX" batteries have two years warranty and we can extend the warranty

[Joj]

Hello. Could someone please correct me if I've written something incorrectly?


XX batteries have two years warranty and we can extend the warranty to 5 years if maintenance contract is signed.
The first year is free of charge, but the subsequent years will cost $750/year.

 

[tedmc]

Hello. Could someone please correct me if I've written something incorrectly?


XX batteries have come with two years warranty, which and we can extend the warranty to 5 years if a maintenance contract is signed.
The first year (of the maintenance contract?) is free of charge, but the subsequent years will cost $750/year.

 

[Tarheel]

Say:

... come with a two-year warranty, which can be extended to five years if a maintenance contract is signed.

 

[emsr2d2]

Hello. Could someone please correct me if I've written something incorrectly the following?

XX batteries have come with a two years two-year warranty and we can extend the warranty that can be extended to 5 years if a/the maintenance contract is signed.
The first year of those five years is free of charge, but the subsequent years will cost $750/year.