K&F Concept 2 Pack NP-F970 Battery with LED Charger, Compatible with Sony NP-F550 F570 F750 F770 F930 F950 F960 F970, High-Power LED Lights, Monitors, Camera Sliders, and More

This is a two pack of Sony NP-F970 compatible rechargeable (LiIon) batteries. It also includes a USB powered 2-channel battery charger.

The batteries exceeded my expectations (and the 47.52 Wh rating on their nameplate), running my 20 watt lights for 3 hours and 10 minutes before shutting down. It took around 72 Wh to recharge each battery, and even at an 80% efficiency rating, that's still a capacity close to 57 Wh per battery. So I feel confident in saying that they will meet their 47.5 Wh rating over the first year or two of their life with no problems.

They snapped into and fit my battery charger and lights perfectly, so no problems with fit and finish.

They do NOT have extra features I've seen in some other 3rd party NP-F970 style batteries, such as an on battery power gauge or built in USB charging port, so you need to have an external charger to recharge them. (Or get an idea of their current charge level.)

The 2 pack includes a small and lightweight USB powered charger and a USB-A to USB-C cable. [The charger accepts either a USB-C cable or a Micro-USB cable.] The package does NOT include a USB power supply, so you will need to provide your own USB-C power adapter (or a USB-A [rectangular] outlet capable of providing 5 volts at up to 2 amps). The USB-C port on the charger supports and successfully negotiates USB-C power delivery (PD) but only supports a 5 volt input level. So the charger steps up the 5 volts at 2 amps input to the 8.4 volt charging voltage needed by the battery. With a single battery, it can charge at 700 mA @ 8.4 volts, or 6 watts, and with both batteries plugged in they each get 500 mA @ 8.4 volts, or 4.2 watts each.

As you can tell by the small watt numbers, this is a slow charger. In fact, it takes this charger about 16-17 hours to fully recharge both batteries from a completely empty state. It works fine, meets all of it's specifications, but is only suitable for very low duty cycle charging. If you just need to keep the batteries plugged in to make sure they are ready to go when you are, and can handle recharging taking overnight or longer, it will meet your needs. However, if you need to recharge these batteries quickly or cycle them fast for continuous usage, you'll need a faster charger. I would consider this charger a "bonus" and not the main part of the package.

In my opinion, the two batteries alone justify the price, although if you don't already have a faster external charger, you may wish to consider batteries that include a built in USB-C charging port and a LED "fuel gauge" built in.

I'm very impressed with how well these batteries perform at this price point. It's an amazing value.

As a rule of thumb, I avoid purchasing low cost batteries from unknown brands because they can ruin your gear or even cause safety problems, so I'm so glad this is from a well known and trusted company.

K&F is a well known brand that I've trusted for years and although they're primarily known for their filters, I've used quite a few of their other accessories and I've never been let down once.

I was a bit iffy at first cause I know K&F does lots of lens filters, but honestly these batteries are awesome!! They hold charge perfectly! 5/5 stars

If you are looking for a multiple battery charger, this is the one you need to purchase. It allows to charge up to four batteries at the same time. It also has a charging indicator that will allow you to watch the status of the charge. It supports all kinds of NP-F570 up to NP-F960.

Overall, this has been a great addition to my charging station as I usually charge between 8-12 batteries on a single session.

This product comes inside of a cardboard box; once opened, you'll find 2x NP-F970 batteries and a charger; they contain 6600 milliamps, which is enough to use most video lights for a while (mine will last about 4 hours per battery with continuous use). The product is high quality and very useful, especially if you are taking photos/videos with more than one video-lights that needs swapping.

The products are very high quality, and I like that they come with a charger, which lets you keep them up and running when taking photos.

I would recommend this product.

This product comes inside a cardboard box; once opened, you'll find the product itself (a charger) and a wire; it is a UK plug socket. After viewing this product, it is priced at £39.99; it charges many different batteries; I am using NP-F970 batteries; the product charges them all very well and quickly.

The product's wire is a little short, but it's long enough for most purposes; the product is high quality, and there is a little screen that shows the amount of battery - it's a really useful bit of kit, especially inside of a studio, it lets you quickly recharge your batteries and get back out shooting.

I definitely recommend this product

I like that the charger is a straightforward drop-in solution and the batteries fit in securely; I did not have any difficult charging the batteries with the included USB-C cable. It's nice that the charger has an additional micro USB port as an alternative cable charging option.

Areas of improvement:
- I wish the charger had a display with percentage reading instead of a red LED that turns green; it would give me a better gauge on how much longer I need to charge and manage my time around charging cycles.

I did run into a compatibility issue with my F400 Pro field monitor where the battery pack locks in; I noticed that the spacing for the locking tab is offset by a few millimeters. I will probably need to do more comparison testing with Sony equipment to see which of these non-OEM batteries fit better.

Overall, the construction of the batteries and charger feel well built; None of the plastics felt too brittle and the rigidity is acceptably. I did not see any physical damage nor imperfections with the finishes.

If you are using a variety of the larger Sony NP batteries then this is a must have, no question.
4 charging slots mean the chances of you ever running out of power are almost zero given how long these batteries last anyway, it charges quickly and efficiently and is something I would consider taking on a job over a couple of V mount batteries given the more lightweight nature of NP when rigged and the ability to have several charged at once.

Recommended.!

These are a great replacement for the Sony brand of the batteries. This battery is very versatile and useful in many devices and applications. What sets this set apart is the dual charger that it comes with. It's great to be able to throw them on the charger and let them charge rather than have to swap them out for other charge batteries.

This charger does the job! And even has a percentage LCD for each battery which is awesome I've never had that before. Some of the images showed batteries so I assumed like pretty much every other product of this kind I found - that it came with 4 batteries. It does not. My bad! Good charger good price.