The Duracell Supreme rechargeable batteries are the ideal choice for high powered devices like for example digital cameras & digital devices which have high energy consumption. When the batteries are fully charged, the Supreme batteries only loose 1% of their capacity by self-discharge. They do not have the so called “memory effect; which causes the capacity of the batteries to decrease the more often you charge & discharge them. The Duracell Supreme batteries can be charged quickly & can be used on any charger. Further advantages: * Can be used 40% more than Ni CD rechargeables * Can be recharged up to 1000 * Leak protection * Can be stored for at least 3 years * Optimum in following temperatures: -20° to +50° * 1.2 V Batteries tested were mignon (AA) rechargeables.