I bought into all the hype of Optimas, to only get 5 years from it, to me, is a huge let down. Any Interstate I've had has gone that easily and didn't need special chargers and yes, I'm on my second as it was a direct replacement when the first one failed in 12 months. When this one gets tired I'm probably going back with Interstate as the vendor here won't cover Optimas anymore as he had way to many warranty issues and had to "eat" a few to many to keep the customers happy.

That's been my experience FWIW...