20-01-2018, 08:25 AM
Roger - I have been using these chargers for quite some time on 6v and 12v batteries without any issues (apart from that previously mentioned weak select button). It won't bring a 6v up from an extremely low level of remaining charge but it will work fine otherwise. You are unlikely to do any damage by trying it as there are protections within the charger unit and it simply won't switch into charge mode if it isn't happy.