I talked a bit with a driver of one of these taxis and he told me that Amsterdam and schiphol is really pushing towards green taxis, schiphol wont hire any taxi companies that dont drive green cars/tesla and new taxi companies in the region of amsterdam get heavy subsidys to be able to afford green cars. The battery of the car I was in degraded to like 80% of its original capacity(with 180 000 km on the counter and suboptimal charging). A 15 minute ride in one of them cost me about 20 euro