FJ ProMax AC/DC Battery and Power Adapter (FJ800, FJ400 II)

Long-Lasting Power for Extended Sessions

• Compatible with FJ400 II and FJ800 strobes
• 1,000+ full-power flashes per charge for FJ400 II and 500+ flashes for FJ800
• AC/DC flexibility with built-in trickle-charge capability
• LED charge indicator lights for easy monitoring
• 3-hour recharge time supports extended sessions
• High-capacity 148Wh, 5000mAh, 29.6V battery for all-day shoots
• Portable and compact at only 2.2 lbs (1.0 kg)
• Over 300 charge cycles for lasting reliability
• Includes power adapter and 9.5' (2.9 m) power cable

Unmatched Power for FJ400 II and FJ800 Strobes

The FJ ProMax AC/DC Battery sets a new standard for portable power, delivering 1,000+ full-power flashes per charge for the FJ400 II and 500+ for the FJ800. Whether you’re capturing dynamic portraits or expansive group shots, this battery offers the endurance you need for demanding projects.

High-Capacity Battery for Extended Performance

With a massive 148Wh, 5000mAh capacity, the FJ ProMax Battery is built to support long, intensive shooting sessions. Its durable construction ensures reliability, while the 2.2 lb (1.0kg weight balances portability and durability.

Reliable Recharge for Uninterrupted Sessions

Recharging in just 3 hours, the FJ ProMax Battery minimizes downtime, allowing you to stay focused on your shoot. LED charge indicator lights on the side of the strobe make it easy to monitor battery levels, so you’re never caught off guard.

AC/DC Flexibility for Maximum Convenience

The FJ ProMax Battery features built-in trickle-charge functionality, keeping your equipment powered and ready during extended sessions when the battery level is above 25%.

In The Box:

• 1 x FJ ProMax AC/DC Battery
• 1 x Power Adapter & Cord

Battery

Flashes per Charge

• FJ400 II: 1,000+ at Full Power
• FJ800: 500+ at Full Power

Battery Type

FJ ProMax AC/DC Li-ion Battery

Battery Capacity

148Wh, 5000mAh

Battery Voltage

29.6V

Charge Power

DC 33.6V, 2A

Battery Removable

Yes

Charge Time

~3.0 Hours

Charge Cycles

300+ (@80% after 300 cycles)

AC Power Requirement

Battery Level ≥ 25%

Electrical

Battery Type

AC/DC Lithium-Ion

Cable Port

Barrel (Charging)

Operating Temp.

32° to 113° (0° to 45°C)

Power Cord

9.5' (2.9m)

Power Supply

100-240 VAC, 50/60 Hz 1.5A Max

Certifications

• FJ ProMax Battery: CE, RoHS
• AC Adapter: CE, cETLus, RoHS

General

Compatibility

FJ800 Strobe; FJ400 II Strobe

Package Qty.

1

Product Dimensions

4.2 × 3.9 × 3.5 in. (10.7 × 9.9 × 8.9 cm)

Packed/Folded Size

13.7 × 12.5 × 7.4 in. (34.8 × 31.8 × 18.9 cm)

Item Weight

2.2 lbs. (1.0 kg)

Materials

Nylon, Plastic, Aluminum, Rubber, Electrical Components

Use & Care Instructions

• Wipe with a dry cloth as needed.
• Keep away from fire, water, and moisture.
• Do not submerge in water.
• Avoid drastic temperature changes before, during, and/or after use.
• Do not attempt to modify any Westcott products. Contact Westcott for assistance.

California Prop. 65

WARNING!

WARNING: This product can expose you to chemicals including benzene, which is not present in the final product, but is known to the State of California to cause cancer and birth defects or other reproductive harm. This warning is required by California Prop. 65. For more information, go to www.P65Warnings.ca.gov.

Product Support

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