Kastar 4-Pack NP-F750 NP-F770 Batteries with LTD2 USB Dual Charger

In this review the Kastar 4-Pack NP-F750 / NP-F770 batteries and LTD2 USB dual charger are evaluated for videographers and content creators who need reliable, portable power for LED video lights. The bottom line: this bundle is best for users who want extended runtime and flexible charging on shoots because the four 5800mAh lithium-ion cells provide substantial capacity and the LTD2 charger supports two batteries at once with both Micro-USB and Type-C inputs. It is a practical, travel-friendly option when paired with compatible GVM LED panels.

Key Features

• 5800mAh Capacity: High-capacity lithium-ion cells deliver longer run times between swaps, reducing interruptions during long shoots.
• Dual Battery Charging: The LTD2 charger can charge two batteries simultaneously, which speeds turnaround when multiple batteries are in use.
• Selectable Plates: Changeable charging plates let the charger accept different battery plates so it can adapt to various NP-F style batteries.
• USB Input Options: Micro-USB and Type-C inputs (charger input 5V 2-3A 15W) provide multiple charging options from common power banks and adapters.
• Intelligent LED Display: The charger shows charging status and estimated battery capacity so it is easy to monitor progress at a glance.
• Portable Design: The batteries and compact charger are easy to carry in a gear bag for location work.

Who It's For

The Kastar 4-pack is aimed at independent videographers, livestreamers, and small studio setups using compatible GVM LED video lights who need several spares to maintain continuous power. The large 5800mAh cells are especially useful for all-day shoots or multi-day events where frequent battery swaps would be inconvenient.

Those who should look elsewhere include users who need original manufacturer batteries with brand-specific warranties or those who require very fast proprietary high-voltage charging beyond the 8.4V 800mA outputs offered here. Also, if you only need a single backup battery, the 4-pack is overkill.

Pros & Cons

Pros

• High 5800mAh capacity gives noticeably longer run time than lower-capacity NP-F cells.
• Dual charging capability gets two batteries ready at once, reducing downtime on set.
• Versatile USB inputs and included Micro USB cable make charging from common power sources simple.

Cons

• Charger output is modest (8.4V 800mA per slot), so charging can be slower than some high-power chargers.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	5800mAh
Charger Input	5V 2-3A (15W)
Charger Output	8.4V 800mA (x1) or 8.4V 800mA (x2)
Charging Options	Micro-USB input, Type-C input; includes Micro USB cable
Compatibility	Compatible with GVM T20R, GVM-50M, GVM-110S and listed GVM LED lights

Our Verdict

The Kastar 4-Pack NP-F750 / NP-F770 batteries with the LTD2 USB dual charger are a practical value for creators who need multiple reliable spares and flexible charging on location. The large 5800mAh cells and dual-charge capability meaningfully reduce downtime, and USB input options make the kit convenient for travel. It is good value for anyone using compatible GVM LED lights who prioritizes run time over the fastest possible charge speed.

Frequently Asked Questions

Are these batteries compatible with my GVM LED panel?
They are listed as compatible with a range of GVM models such as the T20R, GVM-50M, GVM-110S and others noted in the product description; confirm your model is on the compatibility list before buying.

Can the charger charge two batteries at full speed?
The LTD2 can charge two batteries simultaneously, but each slot provides 8.4V at 800mA so charge time will be slower than higher-power single-bay chargers.

Does the kit include a cable?
The package includes a Micro USB cable and supports both Micro-USB and Type-C inputs for flexible charging options.