Kastar NP-F960 / NP-F970 Battery 2-Pack Replacement - Long Run Time

In this review the author tests the Kastar NP-F960 / NP-F970 Battery 2-Pack as a practical replacement option for on-camera monitors and recorders. The bottom line: this two-pack is aimed at filmmakers and run-and-gun shooters who need extended on-set power for monitors such as the Blackmagic Video Assist 5' and 7' series, and it delivers noticeably longer runtime without added risk thanks to built-in protection circuitry. The review focuses on capacity, safety features, compatibility, and whether the twin-pack represents a sensible value for professionals and enthusiasts.

Key Features

• High capacity cells: The 8700mAh lithium-ion batteries provide much longer runtime so monitors stay powered through extended shoots without frequent swaps.
• Compatibility: Designed as replacements for a wide range of field monitors including Blackmagic Video Assist 5' and 7' models and several SmallHD and Portkeys displays, reducing worry about fit and contacts.
• Safety protections: Built-in over-charge, over-discharge, over-voltage, over-current, and over-heating protection helps prevent damage to the monitor and prolongs pack life.
• Industry compliance: Cells meet UL1642 and CE safety standards, offering reassurance for professional workflows and travel to shoots.
• Two-pack value: The package includes two batteries so you can rotate packs and avoid downtime, which is useful for back-to-back shots or multi-hour setups.

Who It's For

This battery 2-pack is best for videographers, independent filmmakers, and content creators who use on-camera monitors such as the Blackmagic Video Assist family, SmallHD models, or Portkeys displays and need longer continuous operation. The higher 8700mAh capacity makes it suited to long documentary days, multicamera runs, or location shoots where access to mains power is limited.

Those who should look elsewhere include users who require original manufacturer branding or warranty-backed batteries from the monitor maker. Also, if a camera rig uses a different proprietary plate or a higher-voltage system, verify compatibility before purchasing.

Pros & Cons

Pros

• Much higher capacity than many stock packs, extending monitor uptime on set.
• Comprehensive protection circuitry reduces the chance of battery or monitor damage.
• Works across multiple popular monitor models so one purchase covers several devices.
• Two batteries in the box provide immediate redundancy and convenience.

Cons

• Not the original manufacturer battery, so users seeking OEM labeling or warranty alignment may prefer branded packs.
• The physical size and weight of high-capacity packs can add bulk to compact rigs.

Specifications

Battery Type	Lithium-ion
Battery Voltage	7.4V
Battery Capacity	8700mAh
Pack Quantity	2-Pack
Safety Standards	UL1642, CE
Protection Circuitry	Over-charge, over-discharge, over-voltage, over-current, over-heating

Our Verdict

The Kastar NP-F960 / NP-F970 2-pack is a practical, cost-effective replacement for filmmakers who need extended runtime and built-in safety for on-camera monitors. It is good value for those who prioritize longer shooting times and cross-model compatibility, while buyers seeking OEM-branded batteries should weigh warranty considerations.

Frequently Asked Questions

Will these batteries fit Blackmagic Video Assist 7' monitors?
Yes, the pack is listed as a compatible replacement for Blackmagic Video Assist 7' models that use NP-F960/NP-F970 style batteries.

How long will an 8700mAh pack run a typical on-camera monitor?
Runtime varies by monitor brightness and features, but the higher 8700mAh capacity provides noticeably longer operation than many stock batteries, reducing mid-shoot swaps.

Are these batteries safe to use while traveling?
The cells meet UL1642 and CE standards and include protection circuitry, which helps with safety; check airline rules for lithium-ion carry-on limits before flying.