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<blockquote data-quote="keep_hope_alive" data-source="post: 7761910" data-attributes="member: 576029">for batteries, i like side posts for audio and top posts for factory.&nbsp; i didn&#039;t have to cut my factory battery connections.&nbsp; i just added my 1/0 power wire and 4awg big 3 wire to the side posts.&nbsp; I run a Group 34/78 battery up front.for the back, marine batteries give you posts with wing nuts that are perfect for adding multiple large wire terminals to.&nbsp; I am very happy with Die Hard Platinum and the warranty is awesome.whatever you do for multiple batteries, you need to keep a few things in mind.1.&nbsp; the batteries need to be equal in technology.&nbsp; they need to have the same charging characteristics and float voltage or the weaker one will **** the stronger one.2.&nbsp; trunk batteries need to be sealed, which is why we said AGM (absorbed glass matt).&nbsp; AGM are sealed batteries and can be mounted horizontally.&nbsp; standard lead acid batteries will off-gas explosive and toxic gas and can spill&nbsp; battery acid.&nbsp; you can tell the difference because they latter will have removable caps for refilling water.3.&nbsp; trunk batteries need to be securely mounted.&nbsp; you can get battery containers that have plastic housings and lids that you can strap down to the car.&nbsp; you can get battery brackets for like $6 that will let you clamp them down.&nbsp; you must ensure the batteries never move, so the wiring connections are not stressed.&nbsp; keep in mind a hard short can cause a battery to explode or start a fire.&nbsp; something you don&#039;t want in your trunk/car.4.&nbsp; all connections to the positive terminal of a battery that serve a load should be fused.&nbsp; you do not have to fuse short jumpers that connect batteries together unless the wire used is more than 12&quot; long.&nbsp; that means multiple batteries should be side-by-side.&nbsp; you should fuse the wire that connects the front and rear batteries, at each end.&nbsp; the reason is to protect the batteries from a short if that long wire run is ever compromised.&nbsp; i&#039;ve seen many occasions where the power wire front-to-rear has been damaged from screws, metal edges, etc.</blockquote>

[QUOTE="keep_hope_alive, post: 7761910, member: 576029"] for batteries, i like side posts for audio and top posts for factory. i didn't have to cut my factory battery connections. i just added my 1/0 power wire and 4awg big 3 wire to the side posts. I run a Group 34/78 battery up front. for the back, marine batteries give you posts with wing nuts that are perfect for adding multiple large wire terminals to. I am very happy with Die Hard Platinum and the warranty is awesome. whatever you do for multiple batteries, you need to keep a few things in mind. 1. the batteries need to be equal in technology. they need to have the same charging characteristics and float voltage or the weaker one will **** the stronger one. 2. trunk batteries need to be sealed, which is why we said AGM (absorbed glass matt). AGM are sealed batteries and can be mounted horizontally. standard lead acid batteries will off-gas explosive and toxic gas and can spill battery acid. you can tell the difference because they latter will have removable caps for refilling water. 3. trunk batteries need to be securely mounted. you can get battery containers that have plastic housings and lids that you can strap down to the car. you can get battery brackets for like $6 that will let you clamp them down. you must ensure the batteries never move, so the wiring connections are not stressed. keep in mind a hard short can cause a battery to explode or start a fire. something you don't want in your trunk/car. 4. all connections to the positive terminal of a battery that serve a load should be fused. you do not have to fuse short jumpers that connect batteries together unless the wire used is more than 12" long. that means multiple batteries should be side-by-side. you should fuse the wire that connects the front and rear batteries, at each end. the reason is to protect the batteries from a short if that long wire run is ever compromised. i've seen many occasions where the power wire front-to-rear has been damaged from screws, metal edges, etc. [/QUOTE]

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