I decided after quite a few dead batteries over the last year it was time to upgrade my Ryobi batteries to Lithium batteries. I like they hold a charge A LOT longer than the NiCad versions and are also lighter in the tool. So far no complaints at all.
Ryobi P106 Compact Lithium-Ion Batteries (2-Pack) - 18v - Lithium-ion - 18v Battery - Battery Pack'
Detail ProductsDetail ReviewsClick here for more informationLithium-ion - lithium-ion, 18v battery
18v battery Lithium-ion - lithium-ion, 18v battery