Follow ZDNET: Add us as a preferred source 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.
The tester is easy to use and the results are easy to decypher.
Adrian Kingsley-Hughes/ZDNET
It’s so simple that I can do it single-handed and take a photo. I used this the other day to go through a pile of batteries left for recycling at a store, and out of the 50 or so batteries left, more than half were less than 50% discharged, and had plenty of life left.
Also: Want an entire tech repair shop of tools in a single messenger bag?
You can also use this to test to see if rechargeable batteries are at the end of their lives. Fully charge one and see what it says on the meter — if it shows less than 80% charge, the rechargeable battery is at the end of its life and needs replacing.
ZDNET’s buying advice
For $30 (at the time of writing, there’s $5 off the price), I think that the Dlyfull B4 battery tester