Swissphone chargers are backwards compatible, meaning that the next generation of pagers released will use the same support equipment: charger and programmer. Other brands force customers to buy new support equipment.
Two types of chargers are currently offered: Standard and Professional. Both chargers use the same internal chip, which determines what type of battery is being used and sound an alert if an alkaline battery has been placed in the charger. Either unit will fully charge the battery and later convert to a trickle charge as to not deplete the cells in the battery.