Does my purchase have any guarantee?

All our products come with a two-year warranty during which we cover any manufacturing defects. 

In the specific case of some products considered as "consumables", such as batteries, it is not possible to use them in a way that is appropriate to their nature without them being consumed. For this reason, the warranty will be applied according to their fungible nature and their specific characteristics such as useful life, specified charge cycles, etc.

Check here how to make use of your product's warranty.