It is already charged in the pack and can be used immediately. Conventional batteries lose much of their capacity very quickly due to storage only This issue could be reduced to a minimum by VARTA Ready2Use Once loaded these new batteries can have 80% of its original capacity after a year of storage . These batteries require a special charger and are best suited to all types of applications . From the wall clocks with a low power consumption to power-hungry digital cameras, Ready2Use is a reliable energy solution.