STK's Olympus BLS-1 Battery - 1800mAh for Olympus PS-BLS1, BLS-1 Batteries and Olympus PEN E-PL1, E-PM1, EP3, EPL3, Evolt E-420, E-620, E-450, E-400, E-410 Digital SLR Cameras. Olympus BLS-1 Battery Pack (POWWER Brand name) 100% OEM Compatible - Complies with or Exceeds OEM Olympus BLS-1 Battery specs Guaranteed to operate with your Olympus BLS-1 digital camera CE Safety Certification SterlingTek's Olympus BLS-1 Battery pack is warranted for 12 month