The BC-L90 is a 2-slot battery charger that provides extra fast charging times for the BP-FL75 Olivine battery. The innovative BP-FL75 battery uses Olivine – Lithium Iron Phosphate – instead of conventional Lithium Ion cathodes. The result is a substantial increase in charge-discharge cycles compared to previous Sony batteries. The BP-FL75 offers perfect integration with PMW-F55 and PMW-F5 cameras. It takes 70 minutes for the BP-FL75 to be fully charged to 75Wh capacity, providing more than 1-hour operation of the PMW-F55 and PMW-F5 working with the AXS-R5 recorder.Compatible with other Sony V-Mount batteriesThe BC-L90 also offers normal charging time for Sony V-Mount batteries, increasing the versatility of the charger.