FNIRSI
FNIRSI HRM-10
FNIRSI HRM-10 Precision Voltage Internal Resistance Battery Tester
L. Rivera
Quality product very useful if you’re dealing with a lot of batteries . Poor instructions manual . You will be dependent on watching YouTube videos to learn how to to operate this properly to get all the benefits it has to offer nothing cheap here. I love mine
John E Hagensieker
First of all. 5 Stars. It does what it says it does and does it very well. I do have two recommendations. First is that when you insert a battery and turn it on you can change the Voltage And Resistance ranges. Both default to auto. In that case my one lithium battery is showing around 190 milli ohms.
When you go to sorting mode you are unable to change the range (or if you can, I can't figure out how). The upper limit and lower limit are set to auto. To set 200 milli ohms upper limit you express that as 0.2 mΩ. Then and only then will it display in the same units. (e.g 192 m ohms on the start screen, If set to 1.0 on the upper range you'll display the resistance reading as 0.19). Again this took me a minute or two to figure out. Once you have it, you have it.
And finally, the HRM-10 can connect to a computer as an external drive to grab an historical testing file. How cool would it be if you could set all those limits up on a computer instead of a tiny screen?
Once you figure out the settings for pass/fail testing you'll love this thing. It has all manner of cables and probes as well.
Bob Weir
I was thinking, of using this to quickly test batteries. It seems to jump around a lot. It also seems to be very accurate. But with all the features that this has, it’s very difficult to operate. Like calibrating voltage and calibrating resistance. I haven’t a clue how to do that. I’m going to try to experiment on car batteries. Because it seems to be so well-made that I would really like to get to use it. If it ends up to be too difficult to use I’m afraid I’ll just let it sit in the drawer, so therefore I’ll probably return it. I’ve been looking at YouTube for any videos of how to use it. There are others here, who wanted to use it to check batteries in cars like mechanics. I should’ve read all the reviews before ordering it. It must be a company out of China and the products that they make seem fascinating. I was smitten by the looks. There also seems to be a way that you can connect it to a computer to do upgrades. The one I have is version 0.4. My computer just recently went down. That’s another reason why I’m probably going to return it.
Nick
Does what it says on the tin, without frills.
The enclosure itself feels both rugged and cheap at the same time, strangely, and it seems like it's about 2x bigger than it needs to be.
The probes, however, are actually really nice. Buttery smooth action, and just strong enough to give you confidence that their grip will hold.
No frills here, which I found refreshing. Love a tool that just does what it does :)
WD
This internal resistance battery tester and milliohm meter is not only useful for testing batteries themselves, but also for getting very accurate resistance measurements of battery cable assemblies. I recently assembled a 48 VDC battery bank from twenty LiFePO4 100AH batteries, and used this tester to verify that the cables that I fabricated all had the same resistance in order to help the batteries remain balanced. The meter itself is well made and is a pleasure to use with its bright, highly readable display. I also used this meter to test a few household batteries and got the results that I was expecting.
I only have two minor complaints about this meter. First, the test leads are really pretty short. That's not a problem when testing a cable for resistance that hasn't been installed yet, because the cable ends can be brought in close proximity to each other so that the meter's leads can reach the cable ends. However, after a cable is installed, it's usually not possible to test the resistance with this tester because the test leads are too short to reach any distance at all. I had the same issue with trying to read the internal resistance and voltage of a string of 100AH batteries. The leads are just too short to reach. The other minor complaint is that while a battery holder is provided for testing small batteries, it could have been designed to be a lot easier to use. As it is, it's kind of a juggling act to get the battery being tested mounted between the contacts of the test fixture. Other than those minor issues, I like the way that this meter works. It is certainly well made, and it is easy to use. For the price point of this meter, I'm well satisfied with it.
Mark
I got this internal resistance tester for evaluation of my hybrid battery modules. I currently have a Fnirsi oscilloscope that i am very happy with. I have been using it on my nickel-metal-hydride battery hybrid modules and been happy with the results and it has saved me a lot of time in determining how many bad modules I had. it had a good instruction book, is designed well, and feel it is a great value for the money. It functions as intended, has rechargeable batteries that last a long time, comes with a variety of test leads and has an adjustable battery holder for testing small AAA and up batteries. Overall, really satisfied with this tester it helped me make an informed decision on rebuilding VS replacing my hybrid battery module.
OBSSD
With as many rechargeable batteries as I have been accumulating recently, it's very helpful to have a tool for checking their internal resistance. It's hard to remember what is considered healthy, so it would be nice if they included a cheat sheet, but you can search the internet and create your own. All in all, it feels very well made and the screen is easy to read, though navigating some of the functions can be a little cumbersome. Some other observations:
• The battery holder and 4-prong test leads were packaged separately and it does not include a storage case. I haven't found a suitable fit yet, but I think one with either of the two interior dimensions would work: 6x10x2" or 7x4.5x3"
• Will charge from a PD USB-C charger but won't transfer data to a computer's USB-C port (need to use USB-A).
• All the included test leads produced near-identical readings when tested on the same batteries so I have higher confidence in it than the IR readings that are given by my battery charger.
• The leads with two spring-loaded tips are a little short you may not be able to press them straight into some batteries (especially cylindrical batteries) - be careful not to bend them when testing batteries that you have to approach from a side angle.
• The battery holder is huge compared to the sizes of batteries it supports, maxing out at the diameter of a D cell and supporting batteries as long as 32650's (a little longer than 18650's).
○ It has markings to set the length for AAA, AA (which also works for C), 18650 and 32650 sizes (missing one for D). The markings are hard to see because they're only embossed and the size you're trying to set will be obscured by the negative terminal.
• Inconsistent UI when entering numeric values - in most cases, the up arrow increments, but when setting date and time, the up arrow decrements the number.
• Thankfully, the volume can be reduced or muted entirely.
• It's not very clear in the manual, but the sorting mode supports 8 different groups (M1-M8), each with different criteria to be evaluated. While the pass/fail counts for each group are reset between uses, the history recordings are retained. They're all jumbled together when viewed on the device, but the CSV file you can download tracks which group each reading belongs to. You can't clear the history on the device, but deleting the history.csv file when connected to the computer will wipe them out.
Gyropilot
When compared to other test equipment that I have, this seems accurate and the measurements are repeatable. I'm using it to check internal resistance of cells in RC aircraft LiPo batteries. Attached is a photo of an adapter board I designed and 3D printed to accomplish this.
Tomakin
This is a very small, low priced internal resistance meter. It is lightweight so very portable. It is also very useful for measuring very small resistances such as those often used for current shunts as most general purpose meters do not have the range to measure these very small values. I used it initially to check batteries as I encountered difficulties with a smoke detector and this simplified identifying which batteries needed to be changed. This unit was very intuitive to use and gave very accurate measurements. The display is bright and easy to read. The M12 connector allows for switching between one of the three probe types and since it is keyed it is a very simple connection. The three probes include one with clamp connections, a second one that uses pogo pins, and a third one that is specific for cells (AA, A, C, D, 18650, etc.). These all worked as expected and I am still really shocked how such an inexpensive meter provided such great performance. My only suggestions to improve the unit would be to add a case so the additional 2 probes can all be stored together with the meter and clamping probe as they were packaged separately. The other item would be to update the user manual and include a table referencing typical resistance value ranges of a set of typical battery size/types so that you could easily identify a good value from a bad one. This is especially important as the different battery types vary considerably in the value range for a good battery! Highly recommended!
J Grunschel
This battery resistance tester is interesting. It is easy fairly easy to use, and the button interface is intuitive for most tasks. However, setting the date and time is not intuitive and the up/down buttons are reversed. You have to set the individual digits, meaning, to set a "12", you have to move to the tens place and adjust to a "1". Then you move to the ones place and adjust it to "2". Also, the digits do not "roll-over" to the next or previous digit, so changing the ones place from a "9" to a "0", does not carry-over a "1" to the tens place. The strange part is the up/down arrows are backwards, so to increase the number you press the down arrow, and vice versa.
The kit comes with several leads to suit almost any testing scenario you need. I really liked the small battery tester. It is adjustable to fit different batteries. However, the "alligator" clamp leads only open to about 1/2 inch, so they will not fit on a car battery. That is a little disappointing.
The device has loads of user settings. I especially like that you can adjust the volume of the button beeps. The device has a record of tests, but the data is only recorded while in "Sorting Mode", and the device has no way to know which battery is which, so you will have to keep track. You can select which "Memory Group" you are storing the values into, but that group is only visible when you transfer the data file (.CSV) to your computer. I did not have any luck getting the data file to update on my computer in real time. I had to disconnect the device and reconnect the device to get the latest data.
Keep in mind that all battery resistance testers are only good for instantaneous spot checks. Meaning, if you want to know how your batteries are changing over time, you will need to keep a log.
The price seems to be about middle of the pack for other devices with similar functionality. Overall, I am fairly pleased with this meter, and it seems to offer more functionality than other meters.
Brian
FNIRSI has done it again, they seem to have a knack for taking mundane test gear and turning it into a gorgeous high quality device that's a pleasure to look at and use and keeping the price reasonable. I rebuild battery packs for retro computers and amateur radio equipment often. The HRM-10 has some great features that will really help me out. The device is solid, in a gorgeous rugged case. Has a built in 1000mAh battery, USB-C interface for charging and data transfer. The unit can accept voltages from 0-100VDC making it ideal for my use case and measure resistance from 0-100 ohms. It comes with two sets of Kelvin Plus Test Leads, one allegator clamp style, the other side by side pin configuration. It's important to note this device uses a four wire test configuration to eliminate the resistance from the leads themselves so each side of the alligator clips is a test point and they should not directly touch. IE: don't leave the clips closed and hold them on the end of a battery and expect to get good results. Open them when doing this or use the side by side set. The unit is capable of user calibration, has data logging capabilities that can be exported by mounting the device as a drive via the USB-C port and has a very cool "sorting mode" where you pre-define your battery requirements for good/bad and can instantly see the results. Very handy when working with some of these batteries that use a ton of cells. Great tool for testing, profiling, sorting, and balancing your batteries. I'm very pleased with the accuracy of the unit and it's going to be my go to battery profiler and tester going forward.
Reviewer
I’ve used this tool and I’m impressed with the quality. The cables and machine itself are made better than I expected and it has a beautiful screen with large numbers. It comes with few different tools, but I love that the multimeter leads are needle sharp which helps when I’m testing on pcb boards
R.S.
Seems like a well made tool with varied probes to do various testing. The battery test probe cradle is adjustable for various physical battery sizes. Color display is clear. Will update as I test more
Toutenhaut
This is so much easier to use than the capacity testers that require the draining of the entire battery!
The result is instantaneous; there is no heat; and the battery does not need to be recharged before being put to use.
I just wish the tester can spit out the Ah figure automatically, obviating the need to look up the conversion charts in the listing, which I printed out so that I can keep them with the kit.
I measured two lead acid batteries and a LiFePO4 unit with this meter. The readings from the lead acid units matched my expectations, though the (brand new) LiFePO4 battery only has half of its claimed capacity, according to the conversion chart. This result is not a big surprise either, as the battery vendor claimed that their product needed to be deep-cycled a few times before reaching its full capacity. Using this device, I will have no difficulty verifying those claims!
I may not need all the extra capabilities built into this instrument at present, but it's good to know that they are there if and when I do.
