Contrary to previous opinion, I have not had any problems with these batteries. I'm quite satisfied because they hold much longer than the previous generation, which is essential for some tools (eg grinders). I've had a little more than a year. It is true that in the past I came across a set of two batteries (even old ones) much less efficient than others. Strict control from the factory seems absent, which is a shame because as long to fall on a good lot, it is a very powerful battery comparable to those of large brands. Too bad because the Russian roulette has more than a hundred bullets, it is expensive! Especially since the performance of Ryobi 18V tools, that have a good quality / price ratio, largely depend on the quality of the battery.
