Duracell High Speed Battery Charger with 2 x AA and 2 x AAA Batteries Duracell Hi-Speed Charger is your simple, safe and reliable solution to never missing out on anything that happens in your life. The Duracell Hi-Speed Charger comes with a partial charge indication and after batteries are completely charged, the charger can automatically shut off to prevent overheating. Its 9 safety features make sure that you have the power you need without the worry. Start a new adventure in life with full power, high performance and good value for money ñ the perfect balance.