Welcome,!!
AND, good question. I have been toying with getting something good, reliable, accurate and repeatable for measuring bell IR.
Most of the cylindrical cell chargers with slide spring loaded contacts really don’t meet the repeatable requirement. But they can be OK for coarse relative measurements. Just reposition the cells a few times and check. You will see what I mean.
I got an XTAR Dragon VP4L Plus Charger due to it having a separate function with dedicated leads and ports for IR Measurement.
It is a bit better at consistency if you are real careful to place the probes properly. SO it may be an option for you. But other than IR, I am not impressed with the device…plus it is expensive as this kind of charger goes.
Probably not worth it unless you are just in love with the other features of the charger. At the cost you can likely find a decent dedicated device to measure IR.
So I continue to look for something to do the job well.
I am hoping people come up with some good suggestions based on positive first hand experience.