Olympus E-420 Battery and Charger with Car Plug and EU Adapter - Replacement for Olympus BLS-1 Digital Camera Batteries and Chargers (1150mAh, 7.4V, Lithium-Ion) - Walmart.com
Olympus E-420 - Photo Review
Amazon.com : Wasabi Power Battery (2-Pack), Dual Charger for Olympus BLS-5, BLS-50, PS-BLS5, BLS-1, PS-BLS1, 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,