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Tony
2025-09-04 15:07:56
Works good discharging my LifePO4 battery to verify capacity. Not the most well cased electronic load tester, but for the price good luck finding anything better.My only word of caution is to make sure the surrounding metal heat sink blades around the fan are bent away from the actual plastic fan. On my tester, one or two of the metal fins were bent slightly forward and was stopping the the fan from being able to spin. So make sure there ample clearance around the fan blades. Luckily I caught the issue in time. I thought it was odd my fan was not spinning and tried to manually spin it with my finger to see if it spin and quickly realized it was wanting to spin, but one or two of the metal heat sink blades was bent and touching into the fan blade and was preventing it from spinning. I bent the heat sink fins back away from the fan blade and it immediately started spinning and dissipating the heat from the tester.If I didn't catch that in time, I am sure I would have burnt the MOSFET chip up. So make sure the fan can spin freely when you use it!Otherwise, great little load tester the for the money!
Adam
2025-08-09 11:55:28
I bought one of these for testing batteries. Works great and has a wide voltage range. Though I tried to push the limits of it to test surge capacity for like 1-2 seconds. It lets you do that, but you WILL fry it, I guarantee it.IT's still the cheapest like it at the time of purchase 1 and 3 years ago (not sure if still cost competitive in 2025), but if it is I highly recommend this.
Craig Gibson
2025-07-19 12:40:35
I purchased this the test USB battery banks for Amazon reviews. The portable power supply type battery banks that you would carry for emergencies. When connecting the bank to USB C input absolutely NOTHING happens. It will not start the test regardless of what i try or how adjust the knows or the alarm settings. It may work great for testing batteries but USB input is a function it is supposed to have as well and it does not work at all!
Carrie Perez
2025-07-02 11:08:48
I, and I would imagine like many of you, got to this product by Will Prowse - the solar and battery guru of YouTube. Anyway, this thing works really well. I immediately tested all four of my LIFEPO4 batteries, and I'm happy to say that all four tested well over the specified/advertised parameters! It took a while too - overnight for each battery (100ah each). I will say that at 185w, the unit heats up WAY TOO much! At 185w it was at 68 degrees Celsius, when I lowered it to 160w, the temp dropped to 55 degrees - that's a pretty significant drop in temp. It did increase the time to deplete my batteries, but I was not worried about leaving this run overnights. There are a lot more menus available - if you unplug the unit, press the button (the only one) and keep your finger on it while plugging it back in, you'll get a menu to change a lot of settings - so you may want to explore that. So far, it's working well and it is very accurate (as compared to my Fluke meter and another smaller more inexpensive meter). I don't know what it will be like long-term, but so far so good. As long as it dies within an acceptable amount of time, I'm pretty sure I'd buy another one.
CR
2025-05-25 15:25:31
I have used this tester several times to test USB battery packs and also LifePO4 batteries. Has been super easy to use and saves all the data even after the test battery shuts off from the BMS. I just wish it had a low voltage cutoff so you could test batteries without a BMS. So I have now also purchased MakerHawk's DL24P tester which does include a low voltage cutoff which will give me more options like testing sealed lead acids or other batteries that don't have a BMS. However with this tester being less $$ it works great for testing batteries that have a built in BMS. You just need to make a decision if its an option you need.
B.CebaUY
2025-05-17 12:08:51
It worked as expected.-
C. Thompson
2025-05-15 15:21:25
This thing is cheap but useful. The interface, controls and instructions are all absolutely terrible but you can watch YouTube videos that explain how it works. Once you have it figured out and set the way you need it's OK. Quality control could probably be better as the first one I bought died within minutes. I've used the replacement quite a bit (weeks) and it's still fine.
Opa S
2025-02-15 15:51:30
I have a lot of AGM and LiFePo4 batteries going into or coming out of battery backup systems. I always wanted to know what the state is of both new and used batteries. I needed to determine if some of the used batteries still had usable capacity, do the new batteries deliver the rated capacity? This tool is perfect for those tests. It is a constant current load, which is perfect for measuring capacity. The load is variable from 0.001A to 20.0 A (within rated wattage limits), it displays input voltage, current, watts, watt hours, amp hours and run time in hh:mm:ss. BE AWARE I was introduced to this device via a YouTube video where the author incorporated a separate battery cutoff module as he indicated this device does not remove the load when the (adjustable) minimum voltage is reached...that it only sounds a buzzer. Since the device he was using looks exactly like this one I can only assume it was the same. His comments in the video are WRONG. Either he didn't set the minimum voltage correctly or he had a defective one. When the minimum voltage (configurable from 0 to 190) is reached a buzzer sounds AND the load is removed (0.0 Amps). Hence if configured correctly you can set and forget (for a reasonable time) without fear of ruining the battery from discharging too far. This is one of the more valuable (not costly) tools in my battery maintenance kit.
Stevo
2025-01-20 13:36:22
Item would not power up. Thought it might have been a power supply issue so tried a different one. No difference, item was faulty. Have initiated return, company no longer on Amazon.
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