Stock 4D Batteries
Ken,Our original 4D batteries are coming up on their 4th birthday and seem to be holding up just fine. The boat is hooked up to shore power whenever at the dock, and being in California this is year-round. I do keep the refer on so that is drawing from the batteries and the charger (Charles model) replenishes what is taken out. I also keep the battery switch on 1 for odd months (Jan, Mar, etc) and on 2 for even months (Feb, April, etc). This way they get a month "off" every other month, and, if there was a shore power failure it wouldn't "kill" both batteries. And, I check the battery fluid level frequently (every month); usually not much water is needed. If it was needed it'd probably indicate a charger problem.As for a starting battery, I've considered adding one but haven't gotten to it. The way we use the boat there really isn't a need for it at this time.Happy Sailing,GaryC310 #230 "Rhythm"