Electronic Load Tester 180W Upgrade Version 4-Wire Color Screen DC Tester Electronic Adjustment Constant Load Meter Lithium Battery Capacity Monitor Discharge Charging Power Meter Checker

I am using it to discharge batteries to specific voltage. It's running fine at 195w at about 70 degrees C. To discharge a battery, set it to CP (constant power) mode, set target voltage and set maximum power. It will regulate current to reach maximum power until it reaches the target voltage. Once the voltage is reached it will print comsumed battery capacity in mAh and test runtime.

Unit is accurate. Within 10mV, 20mA, measured with a calibrated tester.Tested it up to 140W and it run without issues.Software is bad, but it does allow to save a log, which is all I really need from the software.Overall, great unit. It definitely has a place in the lab and it will save me several burnt fingers by eliminating the use of power resistors as dummy loads.

Ordered two of these testers to use to test my LiFePO4 Battery Cells. Work as described. Instructions tough to decipher. Written by someone whose first language is not English. Fortunately, there are plenty of online videos that go through operation. One of the units had a faulty 120vac to 12vdc, 1 amp power supply. No output voltage at all. Fortunately, 12vdc, 1 amp power supplies are pretty common, so I was able to operate both units to test cells with a power supply I had lying around.

really like this load tester. Did not try the app - as just ran it from the little screen/menu. Ran it just short of full power for several days on a 19kWh Gel battery bank (abused it really). It did awesome...great value and great little device.

Received this a while ago. Should have done an inventory on parts.As it turns out, the power supply is missing. Hopefully I can get another one since otherwise it is an expensive brick.No direct vendor support.

I used this to test capacity of 16 Eve 280AH LiFePO4 battery cells.The diodes (not the MOSFET) on this get VERY hot running at 20 amps, so I thought I'd show how hot, and how I measured. Please note that somewhere between 10 and 15 amps is a safe current to run this (and similar testers). First, the DL24P tester I linked above has voltage sense leads for more accurate cutoff voltages, and includes two temperature sensors, one underneath the MOSFET, and another that plugs in and can be placed where you need it. Notice in the picture below, I placed it directly underneath the diode which comes with no heatsink other than the PCB. I did try placing a Raspberry Pi heatsink on the diode, however the actual device has the heatsink side soldered to the PCB and uses the PCB as the heatsink, so I had little hope this would help. Indeed, it made no difference.Additional pictures show, the temperature readings at 20 amp current draw while testing a single 3.65 volt cell (also note I used high quality Arctic MX-4 heatsink compound and replaced the thermal compound on the MOSFET). Also at 15 amps. Sooner or later it will die, but it is accurate and easy to use.Keep the current low, and it will last much longer.

Works as advertised. Allows for a lot of flexibility in testing different types of power supplies and power sources. Comes the the daptors for all basic USB as well as plug-in power supplies.

This is a great way to check battery capacities.