<strong>Yahoo Message Number: 6391</strong>I debating on switching to 4....T105 house batteries this next year. <br/>Can anyone give me a ball park number that these things cost each?? <br/>ALSO....it says in my manual for the Heart 2500...that it is "setup" to charge TWO coach batteries...and if I want to charge more than 2 I need to contact Heart. ?? What changes ...if any..do I need to make...