Review/Teardown of a MUSTOOL ET5410A+ Programmable DC Electronic Load/Battery Capacity Tester 

Thanks for the review Kerry...I never knew how useful an electronic load was at the bench until I got my first one (have two now, more is better!). Looks like a good unit for the beginner, especially at the price point.

Nice unit, just received mine today. I used it intensely for an hour and have a good grasp of it. Enjoyed this review and it further confirms the wisdom of this purchase. I've used quite a few of the Array units in the past and this was a nice update with the color screen and power handling capabilities. And your review shows that it is easily repairable with common parts.

excellent work mate.. very nice breakdown of entire system.

I just bought one of these and I was lost. Thank you, you saved me from a very big headache!

IMO, a decent review of an 'average' product. While I consider the product only 'average', it's still quite adequate for MOST users!

What would be the resistance of the main SHUNT and the load sharing ones near the MOSFETs ??

Excellent review as usual Kerry. Thank you. It would be interesting for you to compare this unit with the Korad KEL102/3 (TENMA 72-13210) at a similar price level

Thanks for the review, I got scalped on Amazon for this, but I needed it quickly, so hey ho. The softare is a good find even though its not very intuitive. So far the tester does waht it should, and makes testing a battery a lot easier than using a bank of power resistors and noting down current and volts every 30 seconds, lol

As an alternative, the KEL103 is another very good low cost DC load. These are branded as Multicomp and Tenma in the UK.

Do you have any auggestions on where to get the uodated firmware for this EL? I have the ET version but as you mention they are identical.

Looks pretty decent for the price. Similar to other loads that used to be more expensive.

Great review! Did you check the load using a scope to check for noise? I found that one of my electronic loads introduced a lot of noise when I was testing some power supplies.

Hi, If I connect a 3.5V 100Ah Li cell, why can I not discharge at more than 10A? Regards, Jean

HI excellent demonstration video, one question, did you turn on the second multimeter (Measure Current) in series in the phase or neutral of the Load Generator? Tks

At this price range nothing else compares, I do battery testing and have been considering replacing my really shitty Atorch tester with a Rigol DL3021 that does only 200W and costs 600 euros. While rigol doesnt require a PC to get capacity results, I guess paying 450 euros more for convenience isnt justified atm. If i wanna do some serious load testing I need to buy more devices and the price of that gonna really skyrocket.

I noticed in the product description that there is a ET5420A+ double channel version. 2*20A instead of 1*40A. That would be more useful to me. But i can't find a way to select it. There is no drop down menu.

Very nice and interesting review! Thanks! You maybe should have done a longer heavy load test at 40A or at full power at 400W to see if it is capable of handling that power. Most chinese products are quite a bit overrated.

Question Kerry, can this DC load handle 28 VDC at 25 Amps? If not what unit would you recomend that has capibility of producing a discharge graph for cap check records? And thank youy for the many great reviews

At 32:07 I noticed the mains ground is connected to the plastic rear panel?

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У меня какие то проблемы с подключением к PC у et5410a+

Another great and extensive review! Could you please give a link to where I might find the "Test Controller" application? I'd love to give it a go. Google is of no help, just guides for testing an Xbox controller!

Thank you. If I have equipment that consumes 400 watts, and also works with four emergency batterys, batterys is fully charged, when reach 52 volts, and I want to test the batteries and know the time it takes to reach 43 volts from 52 volt of 400 watts of continues consumption. Can this device provide this feature?

One should be aware that the heat sink is not ground. It's connected to the positive input terminal. The heat sink should be completely isolated from the chassis by plastic mounting. Be careful with your screws you don't to put ones in that are too long.

So I can set it to 8Ω and attach an amplifier to it and measured performance then try 4Ω load, amongst other stuff ?? ...cheers.

I couldn't make software on PC

Can it measure Wh or Ah?

Is "East Tester" a brand MUSTOOL owns ?

Thanks you, great review to understand what this thing is! :) btw - What are the op-amps driving the mosfets? older dummy loads use TL07x & OP07C etc.. ...I am hoping this one uses something better? Also, is there doco on the communication with the ET5410A+ so I can write my own software, as the provided one is the usual crap (I am a professional systems programmer).

Hello Kerry :) Thank you for your great video! It was a joy to watch, and especially the fact that you (re)explain everything again without asuming a lot of prior knowledge is super helpful to me! It allows me to understand your entire video without any issue, whereas other teardown/in depth review videos very regularly go wayy over my head :D :D So thank you very much for making this video! When I just tried to buy this item from your Banggood link, it says "Invalid Coupon Code" when I try to put in the coupon code. Do you perhaps have another coupon code that will work? And how much do you think the device should cost with (and without) the coupon applied? I ask because the Banggood app is currently listing this item for me as costing approx 170 euros with free shipping, and I couldn't check what happened to the price when applying the coupon because sadly it isn't accepted ¯⁠\⁠_⁠(⁠ ͡⁠°⁠ ͜⁠ʖ⁠ ͡⁠°⁠)⁠_⁠/⁠¯