Anyone know anything about this device?
It has good reviews over at RC forums and other Battery specific forums.
I have a large collection of rechargable batteries including a lot of LiIo batteries.
I have various battery chargers and testers, some considered high end.
But my chargers all give wildly different Internal Resistance values on the same battery so I completely do not trust those numbers.
Was wondering if anyone here has this and what your results with it are?

Specification:

Model: SM8124A
Size:130×72×30mm
Internal resistance Measurement Range: 0.2ohm, 2ohm, 20ohm
Internal Resistance Resolution: 0.2ohm(0.0001ohm), 2ohm(0.001ohm), 20ohm(0.01ohm
Voltage Measurement Rance: 0~2V,2V~20V,20~200V
Voltage resolution (0~2V)1mV ,(2V~20V)10mV, (20V~200V)100mV
Working Environment temperature: -10~+40C
Power: One 9V Battery (not included)
Display: LCD.
Low Voltage prompt
Notice:
The instrument should not exceed the test voltage 200V, otherwise it will cause permanent
damage to the instrument red lead should be connected to high voltage end of the battery (positive side), black lead should be connected to the battery's low voltage end of the measured (negative side);
The instrument is a micro-power smart meters, remove the batteries when not used
do not test the AC as to avoid damage to the instrument

 

The reason chargers don't give reliable readings is the contact with the terminals of the 18650 cell is not firm enough , the contact points have a resistance which effects the reading ... you should be able to get around this if you are willing to solder wires onto the charger which connect to a cell holder , not the type with a curly spring , but this type ...

they hold the cell very tight .

 

So if the contacts are thoroughly cleaned along with the battery terminals, and you hold the contacts on the charger very firmly against the battery when inserting it and while it's reading the IR, you should get more accurate readings?