The Pearstone BLS-5 Lithium-Ion Battery (1050mAh) is a budget-friendly alternative to the Olympus BLS-5. Compatible with all the same cameras as its name-brand brother, the Pearstone version is great as a spare or replacement. Featuring lithium-ion chemistry, the BLS-5 also fits into the realm of long-life use. Lithium-ion allows you to recharge at any point in the cycle, without fear of memory effect - a dreaded syndrome that shortens the life of a battery long before its time.