Kastar 4-Pack NP-FV100 Batteries and LTD2 USB Dual Charger - Extended

Our review of the Kastar 4-Pack NP-FV100 batteries with the LTD2 USB dual charger finds this kit aimed at videographers and camera owners who need reliable, long runtime spares without returning to the wall socket. The single biggest reason to buy is simple: four high-capacity 5750mAh lithium-ion cells plus a compact USB charger provide long recording sessions and flexible charging options for on-location shoots. This review looks at real-world runtime, charging convenience, and compatibility with a range of Sony camcorders.

Key Features

• High capacity battery: Each 5750mAh lithium-ion cell delivers extended recording time compared with standard stock batteries for fewer interruptions during shoots.
• Wide camera compatibility: Works with Sony NP-FV30 NP-FV50 NP-FV70 NP-FV100 compatible cameras including FDR and HDR series models listed by the maker.
• Dual battery charging: The LTD2 charger can charge two batteries at once, useful for keeping multiple spares ready between takes.
• USB powered convenience: Charger accepts Micro-USB and Type-C input and runs from a 5V 2-3A 15W supply so it can be powered from power banks or USB wall adapters on location.
• Intelligent LED indicators: Built-in LED display shows charging status and approximate battery capacity so you can see when cells are ready.

Who It's For

This kit is a good match for independent videographers, travel shooters, and event videographers who use Sony camcorders in the FDR-AX and HDR-CX families and need multiple, high-capacity spares. The long 7.2V, 5750mAh cells reduce mid-shoot battery swaps and the USB charger enables charging from power banks when mains power is absent.

Professional crews who require OEM batteries with manufacturer service and warranty coverage may prefer official branded alternatives, and users needing faster multi-bay charging with higher amperage per slot should look at dedicated mains chargers optimized for rapid top-up cycles.

Pros & Cons

Pros

• Large 5750mAh capacity provides noticeably longer recording time over standard cells.
• Two-battery simultaneous charging and swappable plate adds flexibility for different battery plates.
• USB input options and LED status make on-the-go charging straightforward and visible.

Cons

• Charger output is modest at 800mA per slot, so full charge cycles are not the fastest available.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.2V
Battery Capacity	5750mAh
Charger Input	5V 2-3A (15W) via Micro-USB or Type-C
Charger Output	8.4V 800mA x1 or 800mA x2
Compatibility	Sony NP-FV30/50/70/100 and listed FDR/HDR camera series

Our Verdict

The Kastar 4-Pack NP-FV100 batteries with the LTD2 USB dual charger are a practical, cost-effective solution for shooters who need extended runtime and flexible charging on location. The large 5750mAh cells and USB-powered charger add real convenience and value for independent videographers, though those needing the fastest possible recharge may prefer a higher-output charger.

Frequently Asked Questions

Are these batteries compatible with my FDR-AX100 camera?
Yes, the pack is designed to be compatible with FDR-AX100 and other listed FDR and HDR series Sony camcorders.

Can the charger charge two batteries at the same time?
Yes, the LTD2 charger can charge two batteries simultaneously at 800mA per slot.

Does the kit include a USB cable and what inputs are supported?
It ships with a Micro-USB cable and the charger supports both Micro-USB and Type-C inputs for flexible power sources.