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85B24LS Tesla Model 3 Auxiliary Battery 12V 45Ah, 1 Year Warranty

Original price £82.93 - Original price £82.93
Original price
£82.93
£82.93 - £82.93
Current price £82.93
  • Product Description
  • Technical Specification
  • Warranty Details
  • Product Number: 85B24LS

    Tesla Model 3 vehicles rely on a dedicated 12V auxiliary battery to power essential low-voltage systems independently of the high-voltage traction pack. When this battery degrades, critical functions including door locks, lighting, heating controls, and the central touchscreen display can fail, leaving the vehicle inoperable. The Tesla 85B24LS is a purpose-built lead acid auxiliary battery designed as a direct replacement for these demands. Manufactured to Tesla's specifications, this is a genuine Tesla lead acid battery engineered specifically for the low-voltage auxiliary role in Model 3 applications. It operates at 12V with a capacity of 45Ah (C20), providing stable, sustained power delivery to the vehicle's control systems without requiring any modification or adaptation." The battery occupies a B24 case with dimensions of 234mm x- 127mm - 220mm (L x- W x- H) and weighs 12kg. Terminal placement is Type 1 with polarity code 0 (positive terminal on the left). Hold-down configuration is B00. The OEM cross-reference is 85B24LS. Compatibility with start-stop functionality is not confirmed; refer to the product label for clarification before fitment. No variants are currently available for this product. This battery is backed by a 1-year manufacturer warranty covering defects in materials and workmanship under normal operating conditions. " . Tesla 12V auxiliary battery 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. Key Feature: Backed by 1-year warranty for reliable use and dependable performance. Product Group: 2700, TESLA 12V LOW VOLTAGE BATTERY, Tesla Lead acid battery, purpose-built for dependable performance in the intended application. Engineered as a Flooded Lead-Acid battery, delivering consistent, reliable operation in daily use. Manufactured by Tesla, a trusted name known for dependable quality. Weighs 12.0kg, balancing power and manageability for easier installation and handling. OEM-style fitment supports straightforward replacement and proper mounting. 12V system compatibility with standard vehicle electrical requirements. Compatibility: Engineered for modern passenger vehicles, providing reliable starting power, voltage stability, and long-term durability to support daily commuting and standard automotive electrical demands. Uses: Restores dependable starting for vehicles that need consistent, everyday performance. Suited to Flooded Lead-Acid battery applications, delivering steady operation in daily driving conditions. Supports stable power delivery for ignition, lighting, and onboard electronics. Performs reliably across short trips and longer runs where dependable restarts are essential. About MachineRefurb: MachineRefurb is an e-commerce platform specialising in replacement parts, spares and consumables for construction, agriculture and industrial machinery, serving customers across Ireland, the United Kingdom and Europe. We offer an extensive catalogue of over 200,000 products to keep your machines running. Standard delivery: 1-7 working days across Ireland, the UK and Europe. Fitment Warning: You must check your current battery against the specifications of this battery before ordering to ensure that this is the correct battery for your vehicle. Check battery technology, dimensions, terminal type, polarity, capacity (AH) and cranking performance (CCA). We cannot guarantee correct fitment under any circumstances.

    • Brand: Tesla
    • Voltage: 12V
    • Capacity AH (C20): 45Ah
    • Cold Cranking Amps (EN):
    • L x- W x- H: 234mm x- 127mm x- 220mm
    • Warranty period: 1 Year
    • Weight (Kg): 12
    • Capacity AH (C5):
    • Capacity AH (C10):
    • Capacity AH (C100):
    • Marine Cranking Amps (MCA):
    • Watt-Hours (WH):
    • Length (mm): 234
    • Width (mm): 127
    • Height Inc. Terminal (mm): 220
    • Terminal Placement: 0
    • Terminal Type: 1
    • Hold Down: B00
    • Case Size: B24
    • ETN Number:
    • TTNR:
  • New Grade - 24 Months Warranty from purchase is available on this product.
Frequently Asked Questions

Q1- What is the Tesla 85B24LS battery used for?
ANS- The 85B24LS is the 12V auxiliary battery fitted to the Tesla Model 3. It powers the vehicle's low-voltage systems - including door locks, lighting, heating controls, and the touchscreen display - independently of the main high-voltage traction battery pack.

Q2- What are the voltage and capacity specifications of this battery?
ANS- This battery operates at 12V with a rated capacity of 45Ah measured at the C20 discharge rate. No Cold Cranking Amps (CCA), Marine Cranking Amps (MCA), or Watt-Hour (WH) figures are applicable or published for this auxiliary battery.

Q3- What are the physical dimensions and weight of the 85B24LS?
ANS- The battery measures 234mm (length) — 127mm (width) — 220mm (height including terminal) and weighs 12kg. It is housed in a B24 case.

Q4- What terminal type and polarity does this battery use?
ANS- The 85B24LS uses a Type 1 terminal with polarity code 0, meaning the positive terminal is positioned on the left when viewed from the front. The hold-down configuration is B00.

Q5- Is this battery compatible with start-stop systems?
ANS- Start-stop compatibility for this battery has not been confirmed. Please refer to the label on the battery itself for definitive guidance before installing it in any start-stop application.

Q6- What is the cross-reference number for this battery?
ANS- The OEM cross-reference number is 85B24LS. This designation is used by Tesla and matches the specification of the original auxiliary battery fitted to the Model 3.

Q7- What type of battery technology does this product use?
ANS- This is a lead acid battery, purpose-built for the auxiliary low-voltage role in Tesla vehicles. It is not a lithium-ion battery. The lead acid chemistry is selected for reliable, sustained low-current delivery to control systems.

Q8- Does this battery have an IP rating?
ANS- No IP ingress protection rating is specified or applicable for this product. It is designed for installation within the vehicle's designated battery compartment as per the original fitment.

Q9- What warranty is provided with the 85B24LS?
ANS- This battery is covered by a 1-year manufacturer warranty against defects in materials and workmanship under normal operating conditions. The warranty period begins from the date of purchase.

Q10- How will this battery be delivered and what is the returns policy?
ANS- You may cancel your purchase within 14 days of delivery without providing a reason. To be eligible for a return, the item must be unused, in its original packaging and in a resellable condition. Proof of purchase is required.
Please note returns are not accepted for personalised or customised items, sealed goods that have been unsealed, or items that cannot be returned for hygiene reasons.
To arrange a return, contact us at customer@machinerefurb.com with your order number, reason for return and photos if applicable. Return postage is the customer's responsibility unless the item is defective, damaged or incorrect.

Q11- What are the delivery times?
ANS- Estimated delivery times are as follows:
* Ireland: 1-3 business days
* UK Mainland: 1-3 business days
* Northern Ireland: 3-7 business days
* European Union: 3-7 business days
All orders are shipped with tracking. You will receive tracking details by email once dispatched.

Q12- What is the warranty period for this product?
ANS- This product is covered under a 1-year warranty from the date of purchase.

Grade: New

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