Through the Circle of Ambassadors, I was selected to test these batteries and charger DURACELL HI-SPEED 4 hours. These batteries are very convenient because the load is fast. What is also handy is that Duracell rechargeable batteries do not suffer from "memory effect" and can be loaded without problems even if they are not fully discharged beforehand. So before leaving for a long trip, you can recharge without risk of damaging them. The Duralock technology is a very good thing (the batteries are charged even if you do not use) because children sometimes abandoning some toys and resumed several months later. The only downside for this package is that the batteries are not pre-loaded and the first charge lasted more than 4 hours with 4 hours Charger Duracell.
