Inside a 12 Volt Lead Acid Motorbike Battery

The inner workings of a 12 volt lead acid/conventional type 12v CB14L-A2 (same as YB14L-A2 / GB14L-A2 / EC14L-A2 etc) motorcycle battery. This battery was brand new and never used or filled with battery acid when we dismantled it.

12 volt Battery front view
12v Battery top view

Front and side views of a CB14L-A2 motorcycle battery

12v Battery top loose

Cutting the top off the motorcycle battery

We removed the top and cut through the heavy duty posts that connect the terminals to the plates.

12 volt Battery top removed
12 volt Battery top removed

The battery top

The inside of the battery top, this part was glued to the top of the battery casing and you can see the 2 heavy duty posts that attach to the positive (+) and negative (-) terminals, the 6 battery cell caps (for filling and topping up the battery) and the vent at the top of the picture.

12v Battery lower open case
12v Battery cells
12v Battery terminal

Inside the battery lower casing

The internals of the 12 volt battery. In the pic above you can see where the heavy duty posts attach connecting the plates to the terminals, also through the middle/top of the battery you can see how the plates in each cell are connected to each other.
This battery, being a 12 volt, has 6 cells, each cell should be capable of producing around 2.2 volts (which makes approx over 13 volts in total).

12v Lead plate side view
12 volt Battery plate side view
12 volt Battery lead plate
12 v Battery plates

Lead plate parts from inside the battery

The insides of 1 of the battery cells. This were the lead plates from the end cell so you can see where the terminal posts would attach. You can also see in the top/center of the plates where they would be connected to the other 2 cells.
You can also see the bars across the center/top where the positive and negative plates are joined together.

12 volt Lead plates spread apart

The lead plates spread apart

This pic shows the lead plates and the absorbant separator material used to separate the plates from each other.

The information provided on this page is ‘to the best of our knowledge’ and should not be taken as 100% accurate!!

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