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[Datsun 1200 encyclopedia]

Battery Relocation

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Category: Body Electrical System

Battery relocation means moving the battery from it's normal place. Typically this is done to make room for engine swaps, or to move it to the back to change the weight distribution.



Run the POS cable to the starter, and the NEG cable to the engine block, as in standard 1200 Wiring.

Battery -> Cable -> isolator (disconnect) -> cable -> starter post. Accessories can be run off starter post via a Fusible Link (In stock from the Fusible Link is connected to the POS cable terminal). Do not use a Circuit Breaker.

Battery Box

If relocated to the passenger compartment (including the trunk) the battery should be fitted in a sealed box that vents outside.

21928.jpgAlbum 21928 9406.jpgAlbum 9406

You can move the normal lead-acid battery to the back, or an AGM lead-acid battery. Be sure to vent the battery box to the outside as even AGM can create a little hydrogen gas.

Blue Moroso battery box next to large fuel cell
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Battery Size

You can relocate any battery, either the stock size, or a mini-size battery.

See main article: Battery


  • Use large-gauge battery cables
  • Use a negative cable (do not rely on chassis ground)
  • The stock chassis earth/ground may be retained. Run a 12-gauge wire from POS cable to the unibody (see Wiring).

Connect the negative cable directly to the engine block (as in standard Battery cable mounting).

Disconnect Switch

Basic Rally cars dont need external cut-off until advanced levels.

Consider a racing-style battery isolator (disconnect switch) at the rear exterior of the vehicle:
20963.jpg 9452.jpg

Or a more convenient (non-racing) position for a disconnect switch:


Internal routing though passenger compartment keeps them away from damage from underneath. But it must be properly grommeted to prevente chafing and to seal the passenger compartment. Route them under the carpet.

Or run the cables completely under the vehicle, along the inner side of the chassis rail for example.

Cable entry

Battery Tray Removal

Optional step makes the engine compartment look cleaner and less cluttered.

Before and After

Boot Mounting

557.gifAlbum 557 562.gifAlbum 562 575.gifAlbum 575

AGM type can be positioned on its side. It is recommended to vent the battery in a box, but that being said, AGM battery vent very little compared to regular lead-acid batteries.
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rear-mounted battery box next to fuel cell
21819.jpgAlbum 21819 6228.jpgAlbum 6228


In a ute there is plenty of weight under the tray to mount a battery.

2420.jpgAlbum 2420 10822.jpgAlbum 10822 17597.jpgAlbum 17597 8669.jpgAlbum 8669

battery cradle
5996_5107aa36e0e8c.jpgUpload click to view 5996_5107aa886438d.jpgUpload click to view 5996_5107aab4125f5.jpgUpload click to view

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This page has been accessed 12,354 times. This page was last modified 19:58, 21 June 2018. Content is available under Datsun 1200 Club.