Its important for everyone to understand that by connecting any battery to a high output charger is really not an issue. The battery is self limiting for the most part when it comes to current. In other words, a given battery is only going to accept X charge rate based on such factors as it's own internal resistance and chemical make-up. An AGM type battery has an acceptance rate somewhere on the order of 35-40% of it's amp-hour capacity rating. This compare to as little as 25% for a traditional wet cell tech battery. What this all means is that you can have a 200 amp rated charger connected to a small battery but it just doesn't matter, the battery is only going to accept the charge at it's personal acceptance rate, and indeed it will vary from one battery to another.