Based on this product's specifications, here are some alternatives and similar models
Battery Charger AZO PS for 12V 20Ah Gel Batteries, model LXG166
Summary description:
AZO PS battery charger LXG166 is designed for charging 12V gel lead-acid batteries with a nominal capacity of 20Ah. It provides safe, controlled charging suitable for maintaining and restoring gel batteries used in vehicles, scooters, mobility devices and backup power systems. The unit supports standard charging cycles and helps prolong battery life through regulated current and voltage tailored to gel battery chemistry.