BLS-1 PS-BLS1 Battery and Charger for Olympus E-420, E-450, E-600, E-620, Pen E-P1, E-P2, E-P3, E-PL1, E-PL3 Digital SLR Cameras - AliExpress
Amazon.com : Wasabi Power Battery for Olympus BLS-5, BLS-50, PS-BLS5 & E-420, E-450, E-600, E-620, Pen E-P1, E-P2, E-P3, E-PL1, E-PL3, E-PM1, OM-D E-M10 Mark II, III, IIIs, IV : Digital Camera
Amazon.com : Battery and Charger for Olympus Pen E-PL1, E-PL2, E-PL3 Digital Camera : Electronics