My intention is to use the K&F Concept NP-F550 Battery and Charger Kit to provide a higher capacity battery for my camera monitor, without adding any noticeable weight increase to the whole package.
But, for fun, I connected both batteries to one of my 45w LED panel lights, and ran it at 30% output to see how long these small batteries might last, slightly under 2 hours later, I found out!
The batteries were slightly warm from that load, but charged up normally afterward, so no damage done. They should run my monitor for over 2 hours continuous, so the pair, with the original battery, should set me up for my next weekend away with camera quite nicely.
The charger unit doesn't show the state of charge of the batteries, showing a red LED when charging, changing to a green one when charging is complete. It is not a particularly fast charger, so several hours are needed to go from exhausted to full.
No complaints from me, they will power my monitor beautifully, and I know I can drive a LED panel, at a push, if needed.
But, for fun, I connected both batteries to one of my 45w LED panel lights, and ran it at 30% output to see how long these small batteries might last, slightly under 2 hours later, I found out!
The batteries were slightly warm from that load, but charged up normally afterward, so no damage done. They should run my monitor for over 2 hours continuous, so the pair, with the original battery, should set me up for my next weekend away with camera quite nicely.
The charger unit doesn't show the state of charge of the batteries, showing a red LED when charging, changing to a green one when charging is complete. It is not a particularly fast charger, so several hours are needed to go from exhausted to full.
No complaints from me, they will power my monitor beautifully, and I know I can drive a LED panel, at a push, if needed.
18/11/2025
I’m using these in constant lights. I like that you get two batteries since when I’m using constant lights, I typically use them in sets of two. Everything worked fine with the batteries. They charge up in a reasonable amount of time and last similar to other batteries I have of the same size. I noticed no problems like excessive heat or a drop in power. I like that they come with a charger. I’ve cycled through them multiple time. Good batteries.
15/11/2025
K&F is a brand I have come to trust for all my photography-related purchases, and these batteries did not disappoint!
For the price it is remarkable that they provide 2 batteries, and a quality charger - I have no idea how they do it.
I'm using this on an LED smart panel and it totally transforms what I can do with it. For only $30 at the time of writing. I couldn't afford to buy 'name brand' batteries, and there are so many other brands out there whose quality I don't exactly trust. K&N has delivered again with a great product that lives up to my expectations.
Do not hesitate on this battery kit.
For the price it is remarkable that they provide 2 batteries, and a quality charger - I have no idea how they do it.
I'm using this on an LED smart panel and it totally transforms what I can do with it. For only $30 at the time of writing. I couldn't afford to buy 'name brand' batteries, and there are so many other brands out there whose quality I don't exactly trust. K&N has delivered again with a great product that lives up to my expectations.
Do not hesitate on this battery kit.
09/11/2025
I oftentimes use NP-F batteries to power continuous lights and external monitors.
I happened to need more than usual for an upcoming filming session, so I got these.
They work great so far in my testing.
Build quality is standard, but good nonetheless.
The included charger and USB-C cable are handy in case that you didn't have either previously.
This is a pretty good, standard kit. I recommend it.
I happened to need more than usual for an upcoming filming session, so I got these.
They work great so far in my testing.
Build quality is standard, but good nonetheless.
The included charger and USB-C cable are handy in case that you didn't have either previously.
This is a pretty good, standard kit. I recommend it.
08/11/2025
With a 700mA discharge current, the battery tested at 2140, which is in line with the advertised capacity. Usually, we see a larger gap than this. The NP-F970s from K&F were also very good.
The charger consumes 5W for each battery, or 7W for a single battery, the charge is on the slow side. For 15Wh batteries, this is a reasonable speed. Charging LED's are inverted compared to battery position. This is not the best charger, but this is accurately what is described.
The charger consumes 5W for each battery, or 7W for a single battery, the charge is on the slow side. For 15Wh batteries, this is a reasonable speed. Charging LED's are inverted compared to battery position. This is not the best charger, but this is accurately what is described.
05/11/2025
I have a small collection of NPF batteries and chargers, Some are from unknown brands and some are from branded suppliers, like these ones. For expensive equipment I tend to only trust the branded batteries as I know people who have had major issues in the past with battery issues.
K&F is a brand I trust as I've used their stands and filters for years.
These batteries perform exactly as expected and the charger works fine. It charges no faster or slower than my existing chargers, but it is nice and slimline and therefore is easy to pack away.
The batteries are NPF550 and work brilliantly, I've also used this charger to charge my hefty NPF-950 and it handled those fine too.
The charger and battery seems well constructed and not bulging or flexing anywhere it shouldn't.
Definitely a great option if you need a pair of NPF-550 batteries, these are the ideal size I find for field monitors and work a charm on mine.
K&F is a brand I trust as I've used their stands and filters for years.
These batteries perform exactly as expected and the charger works fine. It charges no faster or slower than my existing chargers, but it is nice and slimline and therefore is easy to pack away.
The batteries are NPF550 and work brilliantly, I've also used this charger to charge my hefty NPF-950 and it handled those fine too.
The charger and battery seems well constructed and not bulging or flexing anywhere it shouldn't.
Definitely a great option if you need a pair of NPF-550 batteries, these are the ideal size I find for field monitors and work a charm on mine.
30/10/2025
This charger and battery set works great. The batteries fit the NP-Fxxx accessories just fine. And the charger is compact and small for easy packing. The charger also has both USB micro and USB C ports for power in.
22/10/2025
Standard NP-F series batteries. its on the lower end of mAh but they work great for monitors and other camera gear (in my case) that uses NP-F batteries. Come with a dual slot charger which works just fine plugged in through USB. I can never have too many of these and this is a great set for a good price for the batteries from a company that you can trust
19/10/2025
I use these batteries for monitors and lights when I'm filming. The 550's are good for about 3 hours on a monitor and are much lighter than the 750's I have (that are double the size/charge). Fortunately, this also means they charge faster.
I do wish the charger was a fast charger, but it's USB, not direct plug, so it can only supply so much power. The charging base is small enough to fit with my gear and has USB-C and micro (anyone use micro anymore?). The only downside to the charger is that it displaysonly charging and full, it doesn't let you know how far along they are (like 3-bars, for example). When I'm at a shoot, sometimes it's useful to know if the battery is almost full, and with this charger, I have to guess. I've also found that if I take a full battery off the charger for a minute, when I put it back on, it'll charge for another 5-10 minutes. I don't know what's happening, if it takes that long to tell it's full or what, but it makes me wonder if it's underfilling the batteries for some reason (poor design, safety, or some other reason).
So far the batteries charge quick and work well. They clip in easily.
I do wish the charger was a fast charger, but it's USB, not direct plug, so it can only supply so much power. The charging base is small enough to fit with my gear and has USB-C and micro (anyone use micro anymore?). The only downside to the charger is that it displaysonly charging and full, it doesn't let you know how far along they are (like 3-bars, for example). When I'm at a shoot, sometimes it's useful to know if the battery is almost full, and with this charger, I have to guess. I've also found that if I take a full battery off the charger for a minute, when I put it back on, it'll charge for another 5-10 minutes. I don't know what's happening, if it takes that long to tell it's full or what, but it makes me wonder if it's underfilling the batteries for some reason (poor design, safety, or some other reason).
So far the batteries charge quick and work well. They clip in easily.
10/10/2025
These F550s power my camera monitor just fine. For more power hungry items like high wattage lights, they only power to 60%, but again, work great for my 6 inch monitor.
09/10/2025