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hi everyone  jeff cote here with pacific yacht  systems and we're doing an ask pys  so here we've got a question from a  fellow voter named casey casey asks  jeff can you give me a quick how-to on  agm batteries how are they different  than flooded  can i run them below 50 just want to  make sure or want to know how to use  them optimally the agm batteries  listen casey this is probably one of top  five questions that we get at boat shows  and trade shows and on our website and  youtube  i mean the big dilemma we ask ourselves  as voters is why would we spend more  money on an agm battery than a flood  battery  well first off is that an agm battery is  maintenance free  and so a lot of us buy flooded batteries  we make a promise to ourselves in the  battery that will take care of it  and then we'll be topping off the fluids  over time and regularly  but in the end most of us fail at that  and so the batteries end up dying the  flooded batteries end up dying because  we neglect them  and it doesn't matter how many times you  took care of your flooded batteries  it doesn't matter that you did it the  last 10 times in a row the first time  you forget  and you leave the plates be the battery  plates be exposed  you're going to damage your flooded  battery so that would be one thing as  may gm batteries are maintenance free  an agm by the way stands for absorb  glass mat  battery okay so they can install it  sideways  they can't leak and there is no flooded  electrolyte the electrolyte is in the  absorbed glass mat  which is good also agm batteries don't  vent as much which is another good  reason so if your batteries are  installed  in your living quarters on the boat in  the cabin you might want to consider agm  as a way to  sort of reduce all this sort of toxic  gassing that happens when batteries get  recharged and the other really nice  advantage about an agm battery an  absorbed glass map battery over a  flooded lead acid battery  is that an agm battery allows you to  have  deeper depth of discharge right dod  so a battery full battery is considered  100  and when someone says 50 dod they mean  taking the battery from 100 to 50 or if  you take your battery for an agm battery  you could actually go even lower some  people are going to bring their agm  batteries all the way to 30  of capacity so that would be 70 of dod  or 30  of capacity so agm batteries provide  deeper depth of discharge without  affecting battery capacity  as it would affect a flooded lead asset  battery  in a lot of scenarios nowadays what we  end up doing is maybe an owner has four  golf cart batteries  we're gonna swap those four golf cart  flooded batteries to four golf cart agm  batteries  and effectively because we can go deeper  on the depth of discharge you know not  stopping at 50  or 50 dod we'll go down all the way to  30 percent  of capacity or 70 dod and that's going  to give the owner an  extra 20 of usable battery capacity  so going with agm is a good way to have  more batteries  not literally but more battery capacity  and that's why probably 95 percent of  the boaters we end up dealing with  are going to go with not flooded lead  acid batteries but absorb  glass mat batteries as a way to increase  their battery capacity on their boat  so great question from casey thanks for  watching this video  if you've got further questions that we  didn't answer please ask them below or  go on our website  and fill up one of the forums and we'll  get a chance to do so  support us to keep this channel ad free  by  donating via paypal or buying one of  these lovely hats  the links are below and lastly if you  haven't subscribed to  our channel please do so that way you'll  get the regular contents  and in closing thanks for watching  you