Class I find that you can go lead-acid batteries with only 6 volts with this charger. I have a vintage motorcycle with 6 volt electrical system on which I have the classic lead-acid battery replaced by a lBleigelakku, which is much more capable management. The charger features compact dimensions and the length of both the network and the charging cables to the battery terminals is generous. It is even a key for switching the charging voltage thereby. For other devices, you must make these with a screwdriver. Overall, a good buy.