I bought a cheap battery tester from ALDI recently, a Globaltronics GT-BT-03. This may or may not be available in Australia yet (I live in Europe) (If it comes to ALDI in Australia, it may be rebadged as Tevion.)
It has a 3-digit LCD display and it connects to various batteries via a sliding extension for the positive pole. It has two negative contacts for testing batteries - one for AAA, AA, C and D cells and another for button cells and 9V batteries. The voltage reading is reasonably accurate compared to my multimeter but the tester doesn't draw much current from the battery. e.g. for the AAA, AA etc. cell contact at 1.1V it draws 21mA at 1.2V it draws 25mA at 1.5V it draws 30mA These readings suggest a load of about 52 ohms.
For the button cell and 9V contact it only draws about 120uA, which is virtually unloaded.
Overall the tester works OK, a bit fiddly to insert the cells but a lot quicker than using a multimeter with normal leads. It sorted out the pile of used batteries I had in a few minutes.
The German version of the instructions are here...there is no English version that I can find at present.