Why does a twin charger only charge one battery at a time?

Kargo Tech, Trimble Repair Parts & Accessories trimble charger dual battery slot Trimble Dual Slot 2 Slot Battery Charger 53018010 for Trimble S, Total Station TRIMBLE S8S6 OR R10 BATTERY; New version Upgraded trimble dual slot battery charger manual Power Supply and Cord for Dual Slot Battery Charger Replacement power supply and regional specific power cord for the Trimble dual slot charger

best online slot machine The Dual-Slot Battery Charger with Power Supply can be used with the Spectra GNSS comes with two slots and can accommodate two batteries at a