"The device itself needs two alkaline AAA batteries to work -- and a set are provided to get you going. Using the tester is easy. The hardest part if figuring out which slot fits which battery, because if you get it wrong, it'll give you an inaccurate measure of how much power remains. Once you've figured out where your battery goes, push the positive end into the slot and use the probe to touch the other end"
"And when I say pretty much any battery, I mean just that. The Dlyfull B4 battery tester works with 1.2V Ni-MH, 1.45V zinc air, 1.5V alkaline, 3.0V lithium manganese, 3.2V LiFePO4, 3.7V Li-ion, and 6.0V, 9.0V, and 12.0V Alkaline packs. It is compatible with AAA, AA, C, SC, D, N and PP3 sizes, as well as a whole range of button cells, including CR123A, CR-V3, 2CR5, 23A, and 27A."
Household batteries are often discarded while still holding usable charge, creating expense and waste. The Dlyfull B4 battery tester accepts a wide range of chemistries and sizes, including Ni-MH, zinc air, alkaline, lithium manganese, LiFePO4, Li-ion, 6V–12V alkaline packs, AAA through D and PP3, and many button cells. The tester itself uses two AAA alkaline cells for power. Operation involves selecting the correct slot, inserting the positive end, and touching the other terminal with a probe; the LCD displays voltage, remaining capacity, and a level bar. Batch testing revealed that many recycled batteries still had substantial life.
Read at ZDNET
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