
This battery tray bolts into the rear passenger side of the engine bay using existing bolt locations. The kit comes completed with battery hold down and installation hardware. The battery tray is designed to accommodate Optima or similarly sized batteries.


The IBS dual battery system uses a 200 amp relay together with a microprocessor to offer a reliable and easy to install system for adding a 2nd battery to the vehicle.
We also recommend installing the Relay Booster Module. The module will enable linking of the main system even if the starter battery has failed.
In the case of a deep discharge of the starter battery (start up of engine from starter battery is no longer possible), the "Link" button on the IBS battery monitor (IBS-DBS/BM3 or DBi-DBS) is pressed. With the support from the RBM at starter battery voltage below 10V the start of the engine from the Auxiliary Battery (AUX) would be activated.
In very cold weather or when starting capacity is reduced the RBM supports the relay to make sure the contacts stay properly closed during link start, this extends the relay life.


If you are planning to install a dual battery system in a 1993 to 1997 FZJ80, you can use a battery tray from a 1991 - 1992 FJ80. The battery location for the 91/92 was on the passenger side. This battery tray will fit the later models with some trimming of the tray.
In order to do this, you need to relocate the windshield washer bottle. To accommodate this we have developed a relocating kit that is an easy bolt in and comes with everything you need to do this.

The Slee dual battery LED indicator utilizes two color changing LED's to show the status of each battery.


The LED color codes are:
LED Color |
Status |
GREEN FLASHING |
OVERCHARGING – Voltage at battery is greater than 14.7v |
GREEN |
CHARGING – Battery is receiving normal charging voltage – 13.1V to 14.6V |
ORANGE |
BATTERY OK – Battery is charged – 12.1V to 13V |
RED |
BATTERY REQUIRES CHARGING - 11.5V to 12V |
RED FLASHING |
BATTERY DISCHARGED – 3V to 11.4V |
NONE |
LESS THAN 3V – NO BATTERY PRESENT (ONLY APPLIES TO AUXILIARY BATTERY HOOKUP) - This enables the 2 LED system to be used without an auxiliary battery present. This prevents a RED flashing LED on the AUX LED. The system will flash the LED during the first second that power is first applied. This is a LED check. After 1 second if the voltage remains below 3V then it assumes no battery is present and stops flashing. |