Batteries not useful charger also a joke

We have 2 types of battery in use. Both batteries are either broken or just plain bad. Estimated max. 30% of the capacity of the original 970 batteries. Striking the slightly lower weight is around 20 grams.
The charger is the standard charger of Patona what the respective battery is adapted only with charging cradle. The charging current is only 500mA, unlike 2000mA the original. So called load around 12 hours. In order for a use on the set is unacceptable. Charger for me was not an argument, but the batteries are useless as I said and go back.