Tesla Automotive Batteries
Tesla 12V Auxiliary Batteries Tesla vehicles have a 12V battery to power essential low-voltage systems such as lights, door locks, heating, and the touchscreen display. This setup is safer and ensures these systems remain operational even if the main battery is depleted. Additionally, it allows Tesla to use standardised components designed for 12V systems, like those in internal combustion engine cars.
Battery Technology
OE Manufacturer
Capacity (Ah)
Dimensions (mm) L x W x H
Layout / Terminal
Case Size
Weight (Kg)
Part No.
Model
TESLA 12V AUXILIARY BATTERY 60B19RS
Model X
12V Flooded
Hankook Atlas BX
40
187 x 127 x 220
1 / 1
B19
85B24LS
Model 3
12V Flooded
Hankook Atlas BX
45
234 x 127 x 220
0 / 1
B24
12.0
AGM U1
Model S 2016 - 2019
12V AGM
Hankook Atlas BX
30
197 x 131 x 186
0 / 1
U1
21.1
DCS-33UNC RIT
Model S 2013-2016
12V AGM C&D Technologies
30
197 x 132 x 173
U1
11.9
All Tesla’s from 2022 moved to a 16V lithium battery.
Features & Benefits: • Long cyclic life performance (up to 5000x at 30-percent depth of discharge (DoD) • Performs well at lower temperatures and low temperature pulse power • Easy Maintenance • High charging acceptance ability – up to 0.6C maximum charging current
Why do they fail? Tesla’s 12V batteries can fail for several reasons: • Age and Usage: Over time, all batteries degrade. Frequent short trips and the use of accessories when the vehicle is off can accelerate this process. • Environmental Factors: Extreme temperatures, especially heat, can negatively impact battery life. • Charging Issues: If the 12V battery isn't charged properly by the main battery, it can lead to premature failure.
60B19RS
85B24LS
AGM U1
DCS-33UNC RIT
Veloris. The Battery Partner.
14
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