After skim the net looking for a reliable battery tester, I let myself tempted by it. It can test all batteries or battery formats I know and it provides the results seem quite relevant. Admittedly, this is subjective, but to have tested other battery testers, I see a real difference between the products.
The only downside is the price, I take a star for that.
However, I am very satisfied with my purchase and I recommend this product.