Halcyon Two 1800 mAH Lithium Ion Replacement Battery for Olympus Pen Digital E-PM1, E-P1, E-P2, E-P3, E-PL1, E-PL3 SLR Evolt-Series E-40, E-410, E-420, E-450, E-600, E-620 Digital Cameras Package Includes: 2 Halcyon Brand Battery Battery Specs: 1800 mAH with Premium Japanese Cells Halcyon Support: Includes 5 Year Halcyon Replacement Warranty. Full Membership Access to Halcyon Customer Support Website Frustration Free Packaging. No wasteful and dangerous plastic blister packs. Compatible with all cameras which take Olympus BLS-1 Digital Camera Batteries