Kastar NP-F550 NP-F570 4-Pack Battery and LTD2 USB Charger - Dual

In this review the Kastar 4-Pack NP-F550 / NP-F570 battery kit is evaluated for independent filmmakers and DSLR monitor users who need reliable on-camera power. The bottom line: this kit delivers a straightforward, portable solution for powering FEELWORLD FW703 and FW759 style field monitors, and it stands out for offering four 2900mAh lithium-ion batteries plus a USB-powered LTD2 charger that can top two batteries at once. The reviewer found the package useful for long shooting days where swapping hot batteries quickly is essential.

Key Features

• High capacity batteries: Each 2900mAh, 7.4V lithium-ion cell provides extended run time for small field monitors so users can shoot longer between swaps.
• Dual battery charging: The LTD2 USB charger can charge two batteries simultaneously which reduces downtime on set when multiple spares are required.
• Interchangeable plate: The charger supports changing the plate to charge different battery plates, adding flexibility for various camera and monitor models.
• USB power options: With both Micro-USB and Type-C inputs and a 5V 2-3A input requirement, the charger is easy to power from power banks or common USB adapters for location work.
• Clear charging status: Intelligent LED indicators show charging progress and battery capacity so operators know when cells are ready without guessing.

Who It's For

This kit is aimed at video shooters who run small on-camera or external field monitors such as FEELWORLD FW703, FW759 and similar 7 in models and need multiple spare batteries to cover long shoots. The included charger is a practical choice for solo operators who value compact, USB-chargeable accessories.

It is not targeted at users of larger cinema batteries or those who need very high output charging stations; professionals who require rapid multi-bank charging for large battery fleets should look at dedicated studio chargers instead.

Pros & Cons

Pros

• Four high-capacity 2900mAh batteries give substantial extra runtime for monitors and small rigs.
• Charger can handle two batteries at once, speeding turnover during long shoots.
• USB inputs including Type-C make it easy to power the charger from modern power banks or adapters.

Cons

• The charger output is optimized for monitor-style plates and may not suit larger camera battery systems.

Specifications

Our Verdict

The Kastar 4-pack with LTD2 USB charger is a practical, cost-effective choice for camera operators who power 7 in field monitors and need multiple reliable spares. It balances capacity, portability and USB charging convenience, making it good value for run-and-gun shoots and location work where standard USB power is available.

Frequently Asked Questions

Will these batteries work with FEELWORLD FW703 and FW759?
Yes, the pack is compatible with FEELWORLD FW703 and FW759 style monitors that accept NP-F550/NP-F570 plates.

Can the charger charge two batteries at the same time from a power bank?
Yes, the LTD2 supports dual charging with a 5V 2-3A input and can be powered by a suitably rated power bank or USB adapter.

Does the kit include a USB cable?
Yes, a Micro-USB cable is included and the charger also accepts Type-C input when used with the appropriate cable.