Energizer has announced a new line of portable battery-powered chargers for iPods, cell phones, and gaming devices. The Energi To Go Power Pack ($30) provides immediate power to iPods from four AA batteries. It works with any dockable iPod and includes a reusable charger, a dock connector tip, and four Energizer e2 Lithium AA batteries. Also announced were the Energi To Go Cell Phone Charger ($20) for various mobile phones, and the Energi To Go Gaming Power Pack ($30) for the Sony PSP, Game Boy Advance, and Nintendo DS. All three Energi To Go chargers will be available in September.