Kastar 4-Pack Battery and LKD2 USB Charger - High Capacity Kit

In this review the Kastar 4-Pack Battery and LKD2 USB Charger is assessed for photographers and videographers who need reliable spare power for older Sony camera models and camcorders. The bottom line: this kit is for users who want high-capacity replacement NP-F series batteries and a compact dual-slot charger that can be powered from USB. The review finds the 2900mAh lithium-ion batteries deliver extended runtime compared with many stock cells and the LCD dual charger with Micro-USB and Type-C input is particularly useful for travel or field use.

Key Features

• High capacity batteries: Each 2900mAh, 7.4V lithium-ion cell provides extended run time for cameras that accept NP-F330/NP-F550/NP-F570 series batteries, reducing mid-shoot swaps.
• Dual-slot LCD charger: The Kastar LKD2 charger charges two batteries simultaneously and the intelligent LCD shows charge status and approximate battery capacity so you can see readiness at a glance.
• USB powered convenience: The charger accepts Micro-USB and Type-C input and includes a Micro USB cable, allowing charging from power banks, laptop ports, or USB wall adapters when AC power is unavailable.
• Balanced output: Charger output is 8.4V 650mA per slot so it charges both batteries safely over a predictable time without special adapters.
• Travel friendly: The kit is lightweight and easy to carry, making it practical for shooters who travel or work on location and need spare cells and a compact charger in one package.

Who It's For

This kit suits hobbyists, content creators, or professionals who use legacy Sony cameras and camcorders that accept NP-F series batteries and who need multiple spares to avoid downtime during shoots. It is especially appropriate for on-location work where USB power sources are more accessible than AC outlets.

Those who should look elsewhere include users who require manufacturer-specific fast charging protocols or those who need USB charging at much higher currents for extremely fast recharge cycles; this charger is designed for steady, safe charging rather than rapid top-up charging.

Pros & Cons

Pros

• High 2900mAh capacity offers noticeably longer runtime than many original batteries.
• LCD dual-slot charger provides clear charging status and can handle two batteries at once.
• USB and Type-C input options increase charging flexibility with power banks and laptops.

Cons

• Charging current of 650mA per slot is moderate, so full recharges are not particularly fast compared with high-current chargers.

Specifications

Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	2900mAh
Charger Model	LKD2 LCD Dual Slot
Charger Input	5V 2A 10W (Micro-USB and Type-C)
Charger Output	8.4V 650mA x2
Included Accessories	Micro USB cable

Our Verdict

The Kastar 4-Pack Battery and LKD2 USB Charger is a practical value kit for anyone using NP-F compatible Sony cameras who needs multiple high-capacity spares and a portable, informative charger. It is good value for travel and extended shoots where USB power is available, though users seeking the fastest possible recharge times should consider higher-current alternatives.

Frequently Asked Questions

Will these batteries work in my NP-F550 camera?
Yes, the pack is specified compatible with NP-F550 and related Sony NP-F series models listed in the product description.

Can I charge both batteries at once from a phone power bank?
Yes, the charger accepts 5V USB input and can charge two batteries simultaneously when paired with a power bank that provides sufficient output.

Does the charger include a Type-C cable?
The kit includes a Micro USB cable and the charger supports Type-C input, so a Type-C cable must be supplied separately if needed.