The ProFoto Car Charger 1.8A for B1 500 AirTTL from Lightbulb Rentals charges the B1's Lithium-ion battery from a car's 12V (cigarette lighter) accessory outlet in just 2 hours.
Canon Battery Grip BG-E20 for 5D Mark IV$39/day
Anton/Bauer Digital G150 Gold Mount Battery (156Wh, 14.4V)$30/day
Sony NP-FZ100 Charger (Z-Series)$10/day
Nikon EN-EL15 Battery Charger$15/day
Sony AC-VL1 Battery Charger$15/day
Sony NP-FZ100 Dummy Battery (Z-Series) to D-Tap$10/day
NP-FW50 Battery$15/day
Sony NP-F960/F970 Battery (L-Series, Large)$15/day