Originally Posted By: MostlyHarmless
<snip>One weakness of this tester (above link): It can't check AA or AAA lithium primaries... so no good for this specific SPOT modell. (AA/AAA lithium are rated 1.5v, not 3v. BTW, fresh AA/AAA lithium should have a closed circuit voltage of 1.6-1.7 volts). <snip>


I believe the model ZTS-MBT-1is designed to test AA and AAA lithium primary batteries and pretty much anything else you want to feed it. I got one because I wanted to make sure not to over-charge or over discharge some rechargeable lithium 18650s which most people understand you need to be careful with.