This replacement Fast Battery Charger 4.5A for B1 500 AirTTL from Profoto will charge the B1's 14.8v Lithium-ion battery in 1 hour. The multi-voltage 16.8v (peak voltage) charger features LED indicators to easily monitor charge status. This is a 100% Tested prior shipping! Terminal plug comes with a standard 5.5mm / 2.5mm plug on a robust cable 18AWG ( 0.824mm2) 105c, 300v UL.CE tested. SAFE!
Charges B1X in 1.5 Hours with 4.5A Charger
Charges B1X in 2.5 Hours with 2.8A Charger
Charge Status LEDs

Energy/Capacity: 44.4Wh / 3.0Ah
Nominal Voltage: 14.8V
Charge Voltage: 16.8V
Charge Current: Max 5.0A
Temperature Condition
Charge: 0⁰C to +45⁰C / +32⁰F to +113⁰F
Discharge: -10⁰C to +50⁰C / +14⁰F to +122⁰F
Measurements
Dimensions: 8.5x10.5x6.7cm / 3.3x4.1x2.6inch
Weight: 0.54kg / 1.2lbs

B1 and B1X