The Green Extreme 2 Pack BLH-1 Battery and Dual Smart Charger Kit is the perfect recharge and go power source compatible with all Olympus OM-D E-M1 cameras. Designed to meet or exceed original manufacturers' specifications for compatibility and performance.- BLH-1 Battery -Green Extreme BLH-1 Rechargeable Lithium-Ion Battery Packs encourage conservation through renewable energy cells to maximize their use and to contribute in a modest way to energy responsibility. Even our packaging is recycled material!- GX-CH2 Dual Smart Charger Base with LCD Screen -The Green Extreme Dual Smart Charger with LCD Screen Base takes the mystery out of charging your Lithium and Ni-Cad batteries. Know instantly how much charging has completed thanks to the clearly visible numerical and bar display, which tells you what percentage of charge. The backlit screen is visible from any angle in any lighting condition. Dual slots lets you charge two battery type batteries at the same time, cutting your prep time in half. And the side USB port allows you to charge phones, tablets, power packs, and other USB powered devices simultaneously. Universal power input allows you to charge your batteries anywhere, by connecting your charger with to standard AC (110-240v) or an optional DC (12-24v) power source. This makes it the best charger for photographers on the move, allowing your batteries to be charged from virtually any wall outlet or vehicle in the world.