K&F CONCEPT NP-FZ100 Battery and Dual USB Charger Kit for Sony A7 IV/A7 III/A9 and more (2280mAh)

If you’re relying on Sony’s NP-FZ100 batteries for travel, long shoots or just busy days, having a dependable backup helps more than you might expect. The K&F CONCEPT NP-FZ100 Battery and Dual USB Charger Kit is designed to give you extra battery capacity (listed as 2280mAh) plus a dual-slot USB charger, so you’re not stuck waiting when you want to keep shooting.

That said, it’s not a “one-size-fits-all forever” accessory: you still need to make sure this battery format and charger setup fits your exact camera use and charging habits. If you’re after something simple to run as an everyday spare, it’s the kind of kit that can make sense—especially if you like topping up via USB rather than only relying on a dedicated charging dock.

The essentials

This is a battery-and-charger kit built around Sony NP-FZ100 compatibility. The kit includes batteries that are described as having no memory effect and long-lasting performance, alongside a dual-slot USB charger. On the charging side, the charger can work in two ways: it can charge two batteries at once, or it can charge a single battery.

K&F CONCEPT also states the batteries and charger include multiple protection features, including overcharge protection, high-temperature protection, over-current protection, over-voltage protection and short-circuit protection. In real-world terms, that’s the sort of safety layer you want when you’re charging at home, on the move, or in less controlled environments (like your hotel room with whatever USB adapter you’ve got to hand).

Key features that matter day to day

The biggest practical win here is the charging flexibility.

The dual-slot USB charger uses USB Type-C and micro USB input, which means you can power it using a USB wall charger, a phone charger, a car charger, a laptop/PC, a power bank, or other USB power sources. That’s useful if you’re often travelling with limited plug sockets, or if you’d rather charge batteries from the same power sources you already carry.

Another thing to consider is timing. Dual-slot charging is only helpful if you actually plan to use both batteries back-to-back. If you tend to cycle through one battery at a time, you may find yourself mostly using the “single battery” mode—still fine, just not quite as “boosted” as the name implies.

What to know about compatibility

The product title and description mention compatibility with a range of Sony Alpha cameras that use NP-FZ100 batteries, including models such as A7 III, A7R IV, A9 II (and related A9 / Alpha 9 lines), plus A6600 and A6700, along with FX3/FX30 and ZV-E1/ZV-E10 II.

It also notes that the charger is compatible with the original charger, which suggests you may be able to use the setup alongside existing charging arrangements. Still, it’s worth double-checking that your camera uses NP-FZ100 batteries and that you’re comfortable charging via USB inputs before you commit—especially if you currently rely on a specific Sony charging routine.

Safety and build considerations (what’s reassuring, what’s not)

On paper, the included protection list is the strongest reassurance in the description: overcharge, high-temperature, over-current, over-voltage and short-circuit protections are exactly the kind of checks you want to see on a battery charger kit.

However, a limitation to keep in mind is that charging performance (how fast it charges in your setup) isn’t specified in the information provided. USB charging speed can vary quite a bit depending on the power source and cable quality, so you’ll want to align expectations: this is a practical USB-charge kit, but it may not match the charging speed you get from a dedicated manufacturer charger.

Usage tips for shooting and travel

A simple example: if you’re going out for a day of event photography and you know you’ll need more than one battery, pop one battery in the camera and keep the second on charge in the dual-slot charger. Later, when you’re back at your accommodation, plug the charger into a power bank or laptop USB output and top up again.

Because it supports Type-C and micro USB input, it’s also easier to manage cables if you already carry one or the other. That kind of “charging without drama” is usually where kits like this earn their keep.

Who it suits (and who might want to look elsewhere)

It makes sense if you want a straightforward battery backup for Sony cameras that take NP-FZ100 batteries, and if USB charging flexibility is part of your workflow. It’s a solid candidate for travel shooters, hybrid creators who move between locations, or anyone who just doesn’t want to be caught with a dead battery.

It might not be the best match if you’re expecting specific, documented charging speeds or highly optimised charging behaviour under particular power conditions. Also, if you’re only after charging for one battery occasionally, you may not benefit much from the dual-slot approach.

FAQ

Is this kit compatible with Sony cameras that use NP-FZ100 batteries?

The description states compatibility with a number of Sony Alpha models that use NP-FZ100 batteries, and it also refers to NP-FZ100 specifically. If your camera takes NP-FZ100, it should align with your setup.

Can the charger charge two batteries at the same time?

Yes. The dual-slot USB charger can charge two batteries simultaneously, or charge just one battery.

What power sources can you use for the charger?

The charger input supports Type-C and micro USB. The description lists common USB power options such as a USB wall adapter, phone charger, car charger, laptop and power banks.

Does it include safety protections?

According to the description, it includes multiple protections including overcharge, high-temperature, over-current, over-voltage and short-circuit protection.

Is there a memory effect?

The batteries are described as having no memory effect.

Final verdict

It’s worth buying if you want extra NP-FZ100 capacity with a dual-slot USB charger that can be powered from everyday USB sources like laptop, car or a power bank. For day-to-day shooting and travel, that flexibility is the main reason this kit can feel practical.

You may want to skip it if you’re very specific about charging speed and expect performance details to be guaranteed under all USB power scenarios—those aren’t provided here. If you prioritise a reliable backup and the convenience of USB charging, this kit looks like it’s aimed at that exact job.