Lithium-ion Battery for B1 500 AirTTL from Profoto will give you up to 220 full power flashes and thousands of minimum power flashes on a 2 hour charge from the 2.8A multi-voltage charger. The 4.5A quick charger shortens that time to 1 hour. Fuel gauge-type LEDs on the battery and both the optional chargers allow you to monitor charge progress.
|Flashes (Full Power)||220|
Green LED indicators: 3 Sections: 100-70%
2 Sections: 70-40%
1 Section: 40-10%
1 Section blinking: < 10%
14 to +122°F (-10 to +50°C)
Storage: 4 to +140°F (-20 to +60°C)