Acumen's Duo, which is capable of monitoring and charging two batteries simultaneously, now comes with the most sophisticated floating charge on the market and a stylish new black colour scheme. Ideal for anyone lucky enough to have two bikes in their garage, the Duo can also be used for most vehicles with a 12V lead-acid battery, (including Maintenance Free and GEL varieties), such as ride-on mowers, jet-skis, quad bikes, etc.