I had the lamp for about 2 years in the cellar in use and was very happy with it at first. However, I was not aware that there is a lead acid battery, which must be charged regularly. Well I did this a few months does not, and now he can no longer charge, saying, LEDs no longer light up only very weakly, halogen bulb and fluorescent tube. After the battery is not replaceable, I can now dispose of the whole lamp. What kind of damage to the environment! Conclusion: Never again a device without interchangeable battery ...