Hybrid Battery

Step by step guide on how a hybrid battery works, this information pertains to all hybrid vehicles.

Step 1 - A hybrid battery is different than a conventional car battery in respect to its composition and application. Where as a typical non hybrid battery has six cells submerged in battery acid, the hybrid battery is comprised of many cells which are created as a dry cell submerged in die-electric gel or silicone.

Hybrid Battery Cells

Step 2 - A hybrid battery is larger than its old counterpart and can weigh up to three times more while expelling over 300 volts with a large amount of amperage (volume.) This aspect creates a safety hazard which can be fatal if mistreated. (USE CAUTION WHEN HANDLING - ELECTROCUTION HAZARD.)

Hybrid Battery Unit

Step 3 - A controller or computer is used to manage voltage and amperage, input and output of the battery. This controller shares data, and is managed by the vehicle main computer system.

Hybrid Battery Controller

Step 4 - Because of the severe duty the battery is subject to, ventilation is essential to battery operation which allows heat to escape.

Battery Vent

Step 5 - The main battery leads are designated by red, orange or light blue coverings, these leads connect to various parts of the drivetrain and electrical system.

Hybrid Battery Lead


Written by
Co-Founder and CEO of
35 years in the automotive repair field, ASE Master Technician, Advanced Electrical and Mechanical Theory.


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Article first published (Updated 2015-01-09)