I was flabergasted that a non-maintenance free battery was being used in the new LGMax we purchased. Dealer said it was due to cost. Really? I haven't seen a maintainable battery since the 80s. Hard to believe there is one here. Anyone see a reason for this? Is there an issue with replacing it with a deep cycle marine battery? I was going to purchase an extra one to have around anyway. Just wondering what everyone else did if anything. Thank you.