Ambassador for the site "want more", I had the chance to test this Duracell charger. First, I find it very convenient, it is very easy to transport if needed. The price is quite correct because it comes with 4 batteries (2 AA and 2AAA) that benefits of technology duralock ie that the batteries are charged in time even if you do not use them. The charger is guaranteed for 5 years, which is very significant. As long as the batteries are charged, the light remains red, after charging is complete, the light turns green. If the red light flashes, there is a charge error. Just small comment, the establishment of AAA batteries could have been a little more practice, but once we took the hand in there. In conclusion, I recommend this product because it is a good value, charger and rechargeable batteries Duracell well their promises.