I use this:
http://vi.raptor.ebaydesc.com/ws/eBayISAPI.dll?ViewItemDescV4&item=171036127989&category=4678&pm=1&ds=0&t=1497826032617
It's not as accurate as a true DC IR meter, but for comparing batteries and change in batteries its consistent enough.
For real accuracy, I use 100w mOhm rated resistors and a multimeter per cell to get very exact and repeatable results.
Edit: just saw you said you didn't want to mess by hand. Sorry. Just use the one I linked. Its consistent and repeatable, so unless you're calculating LVC to the 10th of a volt, its accurate enough, especially since you need to leave buffer for temperature and other connectors