Our SDHQ Built Dual Battery Tray Kit for your 2010-2023 (5th Gen) Toyota 4Runner allows you to mount a second battery in your 4Runner's engine compartment without any drilling or trimming.
Our #SDHQBUILT Dual Battery Wiring for your Toyota 4Runner includes everything you need to wire your SDHQ Dual Battery System. This Wiring Kit is designed to be used with a battery isolator between the batteries.
Recommended to use 2 new matching AGM or Sealed batteries
Batteries in series or parallel applications, where more than one battery is connected to another battery should always have batteries that are identical in age, size and type. Batteries that are different from each other in any of those ways will behave differently when delivering and receiving electricity, which can leave one chronically undercharged, while the other is chronically overcharged, shortening the lifespan of both.
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