The rifle iO The charger impudence. Warranty?

The charger is a joke. I would like to quote the attached sheet of instructions here: "The batteries should never be charged overnight the enclosed chargers usually have no timeout ..... Calculate before charging, the charging time using the following formula ........ ".
The warranty information are interesting quote: "A warranty can be found at our products not usually ..... we shall at as part of the statutory provisions, if an error during the transfer should be present ..... "
Luckily, there are in Germany a legal guarantee.

At the gun, I can not report anything negative so far.