Kastar 4-Pack NP-F750 NP-F770 Battery and AC Wall Charger - Extended

In this review the Kastar 4-Pack NP-F750 / NP-F770 battery kit is assessed for photographers and videographers who need reliable extended runtime for on-camera field monitors. The bottom line: this kit is for users of FEELWORLD and similar DSLR field monitors who want spares that match the original battery form factor and provide long runtime thanks to a 5800mAh capacity. The pack also includes a compact AC wall charger with foldable flat pin so you can recharge between shoots without carrying bulky chargers.

Key Features

• High capacity battery: Each 5800mAh lithium-ion cell gives noticeably longer runtime than many single-use packs, reducing the need to swap batteries during long takes.
• Compatible voltage: The 7.4V output matches common NP-F750 / NP-F770 requirements so the batteries power FEELWORLD monitors without voltage mismatch concerns.
• AC wall charger with foldable pin: The included charger has a flat foldable AC pin that stores easily in a kit bag and fits standard AC 100~240V inputs for international use.
• Simple charge indicators: LED feedback shows red while charging and green when the battery is in standby or fully charged, making it easy to tell readiness at a glance.
• Bundle convenience: The 4-pack plus single charger supplies multiple hot-swap batteries for extended shoots, eliminating frequent trips to recharge a single cell.

Who It's For

This kit is best for camera operators, indie filmmakers, and on-set assistants using FEELWORLD FW568 V2, FW703, FW759 and similar field monitors that accept NP-F750 / NP-F770 style batteries. It appeals to anyone who runs long recording sessions or needs backup power on location without access to V-mount or NP-style power solutions.

Those who should look elsewhere include users who need a car adapter or European plug bundled (this kit only includes the wall charger and not a car adapter or alternate plug), or professionals requiring official brand batteries for warranty or studio-standard power management.

Pros & Cons

Pros

• High 5800mAh capacity gives extended runtime and fewer battery swaps during shoots.
• Includes a compact AC wall charger with foldable flat pin for easy storage and travel.
• Clear LED indicators ease charge management so batteries are ready when needed.

Cons

• Package does not include a car adapter or alternate plug types, so additional adapters may be required for some users.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	5800mAh
Charger Input	AC 100~240V 50~60Hz
Charger Output	DC 8.4V 600mA
Charge Indicator	LED red charging / green full or standby
Package Contents	4-Pack batteries + 1 AC wall charger

Our Verdict

The Kastar 4-pack is a practical, cost-effective way to add extended runtime to FEELWORLD-compatible field monitors, offering dependable 5800mAh cells and a compact AC charger for on-location use. It represents good value for shooters who need multiple spares, though studios needing vehicle charging or specific regional plugs will need extra adapters.

Frequently Asked Questions

Are these batteries compatible with FEELWORLD FW703 and FW759?
Yes, the pack is compatible with FEELWORLD FW703, FW759, FW568 V2 and other monitors that accept NP-F750 / NP-F770 style batteries.

Does the charger support international voltage?
Yes, the charger accepts AC 100~240V 50~60Hz, but it ships with a foldable flat pin only and does not include other plug adapters or a car adapter.

How does the LED indicator work?
The charger shows a red LED while charging and a green LED when the battery is in standby or fully charged.