I have several of their One+ tools, which all share the same batteries. I have 5x Ni-Cads upto about 6 years old, still working fine. Last October I bought 2x 1.4aH Lithium batteries and a suitable charger from my local Screwfix trade counter. These didn't work at all and were returned for replacement. The replacements worked OK for around 6 months then gave up = charger claims to charge them, but nothing when attached to tool - not even slow running. Today I finally got around to returning them to Screwfix, and after sucking of teeth and waiting for managers, then phoning head office they finally agreed to replace them... but don't have any in stock - I now have to return tomorrow to collect them.
All this doesn't inspire confidence in Lithium power tool batteries. Has anyone else had issues with Lithium batteries? It could just be a bad batch but it makes me wonder if I'll be back in the same situation in 6 months, when the warranty expires!
It is possible the issue is with the charger instead, however it charges Ni-Cads without issue. (It's one of their 6 slot ones). None of my other Ryobi chargers support Lithium batteries so I can't prove it!