Hi all

 

I am gonna install a 2 of amplifiers into my Z which will total approx 60W of power required. My question is would 1 battery cover this and if I was to buy a new one anyway because im not too happy with the present one, can anyone recommend one to go for?

 

Cheers

Pete

one battery would be fine bud, if you want to change your battery , i would go for a deep cycle, cyclic duty gel battery about 85ah would fit in the standard battery tray .. far cheaper than an optima @ 55ah.. the thing that people dont understand is a car alternator will only charge a max of 75% of the battery capacity and to keep a battery in good health it is advisable not to discharge below 60% of the battery capacity

 

this is a rough idea how it works

 

55ah charged by alternator 41.25 AH 33ah @ 60% discharge = 8.25 ah spare to keep the battery in top condition which at the power rating u are using plus head unit and other items would give you about 45mins with out engine running

 

where as

 

85ah charged by alternator 63.75ah 51ah =12.75 ah spare which would give you just over an hour and still have more reserve power than the optima has standard and about half the price .. optima batteries are IMO only good in audio systems if you need massive current in short blasts for competition use

 

hope this didnt confuse you too much lol

one battery would be fine bud, if you want to change your battery , i would go for a deep cycle, cyclic duty gel battery about 85ah would fit in the standard battery tray .. far cheaper than an optima @ 55ah.. the thing that people dont understand is a car alternator will only charge a max of 75% of the battery capacity and to keep a battery in good health it is advisable not to discharge below 60% of the battery capacity

 

this is a rough idea how it works

 

55ah charged by alternator 41.25 AH 33ah @ 60% discharge = 8.25 ah spare to keep the battery in top condition which at the power rating u are using plus head unit and other items would give you about 45mins with out engine running

 

where as

 

85ah charged by alternator 63.75ah 51ah =12.75 ah spare which would give you just over an hour and still have more reserve power than the optima has standard and about half the price .. optima batteries are IMO only good in audio systems if you need massive current in short blasts for competition use

 

hope this didnt confuse you too much lol

That's exactly the answer I was looking for. Thanks bud!

Can you recommend the best place to get batteries or should i just wander into any old autofactors?

That's exactly the answer I was looking for. Thanks bud!

Can you recommend the best place to get batteries or should i just wander into any old autofactors?

 

try this bud .. same batteries i supply but i dont keep this size in stock .. if memory serves me right this fits directly in your tray .. have a quick measure though

 

http://cgi.ebay.co.uk/LONG-LIFE-AGM-85AH-CARAVAN-MARINE-LEISURE-BATTERY_W0QQitemZ130106265094QQihZ003QQcategoryZ36798QQrdZ1QQcmdZViewItem

Thats spot on thanks again :D

So glad I posted the question now :dance: I owe ya a :duffer:

 

Cheers

Pete

NP bud .. glad to be of help

 

John

try this bud .. same batteries i supply but i dont keep this size in stock .. if memory serves me right this fits directly in your tray .. have a quick measure though

 

http://cgi.ebay.co.uk/LONG-LIFE-AGM-85AH-CARAVAN-MARINE-LEISURE-BATTERY_W0QQitemZ130106265094QQihZ003QQcategoryZ36798QQrdZ1QQcmdZViewItem

 

 

did you get one of these? I'm looking for a new battery and it looked to me that it was either going to be an very tight fit or a not fit at all

did you get one of these? I'm looking for a new battery and it looked to me that it was either going to be an very tight fit or a not fit at all

Yeah i measured it up yesterday and it looks like it will touch the bonnet.

Try this, http://www.300zx.co.uk/forums/showthread.php?t=90051&highlight=battery I'm running 2 amps, 2 sets of comonents, and a sub. No problems at all.

 

Andy

What about this battery?

 

http://cgi.ebay.co.uk/SEALED-85AH-STARTING-LEISURE-BATTERY-CAMPERS-BOATS_W0QQitemZ130111201230QQihZ003QQcategoryZ36798QQrdZ1QQcmdZViewItem

that will do bud .. next best thing, its a shame the first one didnt fit

that will do bud .. next best thing, its a shame the first one didnt fit

yeah 245mm is just too damn close. 225mm should do the trick tho :D

yeah 245mm is just too damn close. 225mm should do the trick tho :D

 

if you look at

http://www.automotive-electrical.co.uk/batteries/energy%20marine%20and%20rv%20full%20catalogue.pdf

 

it has the first one at 237mm

and the second at 225

both of those batteries have the terminals the wrong way round for the 300zx

 

managed to fit the bigger one in ok(had to remove scuttle pannel to wire it up) , just had to make up some longer cables to attach it

 

the larger one came with screw terminals on the battery and the standard battery terminals screw into them, so you can bolt ring crimps straight to the battery to save height

 

be careful if you do screw the battery terminals in as i sheared one off fitting it and spent ages removing it