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Westcott FJ ProMax AC/DC Battery and Power Adapter for FJ800, FJ400 II & FJ250
The Westcott FJ ProMax AC/DC Battery delivers serious power for demanding shoots, giving you longer runtimes, faster workflows, and fewer interruptions. Designed for the FJ Wireless system, it combines high-capacity performance with AC/DC flexibility, making it ideal for both studio and on-location work.
The Perfect Accessory For
- Photographers running long or high-volume shoots
- FJ800, FJ400 II, and FJ250 users needing extended battery life
- On-location photographers without constant access to mains power
- Studio shooters wanting uninterrupted sessions
Key Features
- Compatible with FJ800, FJ400 II and FJ250 strobes
- Up to 1,400+ flashes (FJ250), 1,000+ (FJ400 II), 500+ (FJ800)
- High-capacity 148Wh, 5000mAh battery
- AC/DC operation with built-in trickle-charge capability
- 3-hour recharge time for minimal downtime
- LED charge indicators for quick battery monitoring
- Over 300 charge cycles for long-term reliability
- Compact and portable at 2.2 lbs (1.0 kg)
Built for Long Shooting Days
This high-capacity battery is designed to keep up with demanding workflows, delivering consistent performance across extended sessions. Whether you’re shooting portraits, events, or commercial work, it provides the endurance you need.
Flexible AC/DC Power
The built-in trickle-charge feature allows you to run your strobe while charging, helping to maintain power during longer shoots when connected to mains. It’s a simple but effective way to reduce interruptions.
Fast, Reliable Recharging
With a full recharge time of around 3 hours and clear LED indicators, you can quickly get back up and running and keep track of your remaining power at a glance.
What’s Included
- 1 x FJ ProMax AC/DC Battery
- 1 x Power Adapter & Cord
TFC’s Verdict:
If you’re pushing your FJ lights hard, this is the battery to have. More flashes, less swapping, and a much smoother shooting day overall.
MPN: 5052-A
| Compatibility: | FJ800 Strobe, FJ400 II Strobe, FJ250 Strobe |
| Flashes per Charge: | FJ250: 1400+ at Full Power, FJ400 II: 1000+ at Full Power, FJ800: 500+ at Full Power |
| Battery Type: | FJ Pro AC/DC Li-ion Battery |
| Battery Capacity: | 148Wh, 5000mAh |
| Battery Voltage: | 29.6V |
| Charge Power: | DC 33.6V, 2A |
| Battery Removable: | Yes |
| Charge Time: | 3 Hours |
| Charge Cycles: | 300+ (@80% after 300 cycles) |
| AC Power Requirement: | Battery Level ≥ 25% |
| Certifications: | FJ Pro Battery: CE, RoHS, AC Adapter: CE, cETLus, RoHS |
| Power Cord: | 2.9m |
| Plug Type: | Type G (UK) & Type C (EU) |
| Power Supply: | 100-240 VAC, 50/60 Hz 1.5A Max |
| Battery Type: | AC/DC Lithium-Ion |
| Cable Port: | Barrel (Charging) |
| Cooling: | Passive |
| Operating Temp.: | 0° to 45°C |
| Product Dimensions: | 10.7 × 9.9 × 8.9 cm |
| Packed/Folded Size: | 34.8 × 31.8 × 18.9 cm |
| Item Weight: | 1.0 kg |
| Materials: | Nylon, Plastic, Aluminium, Rubber, Electrical Components |