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Technical Specification
PRODUCT NUMBER YBX7335YBX7115YBX7030EL1000EL1050
Voltage 1212121212
Capacity (AH) 808580100105
Hold Down NB3N
Cold Cranking Amps (EN1) 780760760900950
Terminal Type T1T1T1
Length 305317260353392
Width 173175173175175
Height 225190225190190
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Q 1. What is the voltage and capacity of the Bosch S4E13 battery?

A. The Bosch S4E13 is a 12V battery with a capacity of 95Ah (C20) and a cold cranking amps (CCA EN) rating of 850A.

Q 2. What does EFB technology mean and why does it matter for start-stop vehicles?

A. EFB stands for Enhanced Flooded Battery. The technology reinforces the positive plate with a polyester scrim to improve active material retention and charge acceptance. This allows the battery to sustain a greater number of partial-state-of-charge cycles, which is essential for vehicles with start-stop systems that repeatedly cut and restart the engine in traffic.

Q 3. What are the physical dimensions and weight of the S4E13?

A. The battery measures 353mm in length, 175mm in width, and 190mm in height including terminals. It weighs 24.98kg.

Q 4. What terminal type and polarity does the S4E13 use?

A. The S4E13 uses Terminal Type 1 (standard European post terminal) with polarity code 0, meaning the positive terminal is positioned to the right when viewed from the front of the battery.

Q 5. What hold-down type does the Bosch S4E13 require?

A. The S4E13 requires Hold-Down Type B13. Please ensure your vehicle's battery tray and securing bracket are compatible with this hold-down specification before fitting.

Q 6. Which battery type does the S4E13 cross-reference to?

A. The Bosch S4E13 cross-references to Type 019 EFB. It is suitable as a direct replacement for vehicles specifying a Type 019 EFB battery, subject to confirmation of fitment dimensions and terminal placement.

Q 7. Is the S4E13 compatible with vehicles that have standard (non-start-stop) charging systems?

A. The S4E13 is optimised for start-stop and energy management applications. It can function in conventional vehicles, but its full cycle-life advantages are best realised in vehicles designed for EFB or higher-specification batteries. Always consult your vehicle manufacturer's specification.

Q 8. What warranty does the Bosch S4E13 carry?

A. The S4E13 is covered by a 3-year warranty, providing protection against manufacturing defects and supporting confidence in long-term performance.

Q 9. Are other capacities available in the Bosch S4E EFB range?

A. Yes. Related variants include the S4E08, S4E10, S4E11, S4E41, and S4E42, as well as Bosch EFB models LE002, L4034, and L4027. Each variant differs in capacity or fitment, so please verify the correct specification for your vehicle.

Q 10. What are the delivery and returns terms for the Bosch S4E13?

A. Standard delivery is 1–3 working days within UK mainland. A 30-day returns policy applies. Please ensure the battery is unused and in its original packaging to qualify for return.

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