Kastar NP-F750 NP-F770 4-Pack Battery and LTD2 USB Charger - Dual

In this review the Kastar 4-Pack NP-F750/NP-F770 Battery and LTD2 USB Charger is evaluated for videographers who need reliable runtime for Blackmagic Video Assist monitors. The bottom line: this kit's single biggest advantage is extended on-camera power through four 5800mAh lithium-ion cells plus a compact dual USB charger that can replenish two batteries simultaneously. For anyone running a Blackmagic Design Video Assist 5' or 7' monitor on long shoots, this package removes the frequent battery swapping and adds flexible USB charging options.

Key Features

• High capacity batteries: Each 5800mAh lithium-ion cell provides long runtime so monitors and recorders run longer between swaps.
• Dual battery charging: The LTD2 USB charger can charge two batteries at once, cutting downtime when multiple spares are in use.
• Interchangeable plate: The charger plate can be changed to accommodate different battery plate types, making it versatile for varied workflows.
• USB powered convenience: Micro-USB and Type-C inputs mean the charger can use common power banks or wall adapters for on-location charging.
• Visual charging status: Intelligent LED indicators on the dual charger show charging progress and relative battery capacity so you know when a cell is ready.

Who It's For

This kit is aimed at independent filmmakers, DSLR/mirrorless shooters and ENG operators who pair a Blackmagic Video Assist 5' or 7' monitor with extended shooting days and need multiple spare cells ready. The high 5800mAh capacity and the ability to charge two batteries at once are especially useful for timelapse, multicamera runs, or long-form interviews.

Photographers and casual users who only need short runtime or who prefer OEM batteries and chargers should look elsewhere; if you rarely shoot more than a single take per day the extra capacity and charger flexibility may be unnecessary.

Pros & Cons

Pros

• Four high-capacity 5800mAh batteries give substantial extra run time for monitors and recorders.
• The LTD2 charger charges two batteries simultaneously, reducing turnaround between takes.
• USB input options, including Type-C compatibility and a supplied Micro-USB cable, make on-location charging straightforward.
• LED indicators clearly display charge status so users can manage spares without guesswork.

Cons

• Charger output is limited to 8.4V 800mA per port, so charging is not especially fast compared with higher-wattage desktop chargers.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	5800mAh (each)
Charger Input	5V 2-3A (USB) 15W
Charger Output	8.4V 800mA x1 or 800mA x2
Charger Ports	Dual USB with Micro-USB and Type-C input options
Compatibility	Blackmagic Video Assist 5' and 7' monitors (12G-SDI/HDMI and 3G-SDI/HDMI models)

Our Verdict

The Kastar 4-Pack NP-F750/NP-F770 with LTD2 USB charger is a practical value for shooters who need extended runtime and on-location charging flexibility for Blackmagic Video Assist monitors. It combines four large-capacity cells with a compact dual charger and USB inputs, making it a solid choice for indie filmmakers and field crews who prioritize run time and portability over the fastest possible charge speed.

Frequently Asked Questions

Are these batteries compatible with Blackmagic Video Assist monitors?
Yes, the pack is listed as compatible with Blackmagic Design Video Assist 5' and 7' monitor/recorder models.

Can the charger charge two batteries at the same time?
Yes, the LTD2 charger supports simultaneous charging of two batteries with LED status indicators for each slot.

What inputs does the charger accept?
The charger accepts Micro-USB and Type-C inputs and includes a Micro-USB cable for power sources up to 5V 2-3A.