I am slowly switching over to the Ryobi 18v line from my 20v Porter Cable tools as I dig Ryobi's extensive offerings. I've already picked up some handy tools and looking forward to deal shopping to buy more. But I'm too cheap to buy Ryobi drills/drivers/saws while my Porter Cable batteries are still able to power them. My batteries are from 2014 and 2015 and just curious what the average age of battery packs are when they start to fail. I'm actually pretty impressed they have lasted as long as they have so far (8 and 7 years).