Mine finally arrived today, after a little bit more than a month. Here's a picture:

I've tried testing resistors, ldrs (which was identified as a fixed resistor), transistors (pinouts, type and hfe), caps and leds (shows drop voltage and blinks the led a few times). I've tried a voltage regulator too, but it identified it as a diode.
I'm happy with this little device. It's good for the price. And about the batteries, I'm not a battery guy too, but I think this one deserves one. Also, I'm using a "dead" battery from my acoustic guitar, measured at about 6V, and it's working fine.