Batteries on board charter yachts are not treated nicely! The charging procedures required to protect their health, are often neglected when people are in holiday mode!
This is why we are focusing on Banner (a premium Austrian manufacturer) and more specifically on their Energy Bull and Running Bull products. Please have a look here
https://www.bannerbatterien.com/en/Battery-knowledge/29-Handling-boat-batteries-professionally
Every time that the life of a shipyard installed battery comes to its end, we replace it with an appropriate Energy Bull battery, if it is a “service battery”, taking advantage of its deep discharge characteristics or with an appropriate Running Bull battery, if it is any other battery.