I'm looking for a fast battery tester, that will test the battery under load.
I don't care for precise capacity, just if the battery has enough juice at the moment.
There're those cheap ones for primaries (mainly alkalines), but I haven't yet found a reasonably priced one that tests rechargeables.
A voltmeter isn't enough, especially if the battery is getting older.
There's the ZTS http://www.ztsinc.com/mbt1.html , but it's 75$, and the mini version doesn't test li-ion http://www.ztsinc.com/minimbt.html .
Do you know of any cheap (<10$) that can test li-ion and NiMH batteries?
(btw, is there any difference in measuring protected vs unprotected batteries?)