VARTA AUX9 Auxiliary Battery 12V 9Ah 130A AGM | Silver Dynamic Aux | 509 106 013

The VARTA AUX9 Silver Dynamic Auxiliary (part no. 509 106 013) is a 12V 9Ah 130A AGM auxiliary battery — the small second battery many modern start-stop, hybrid and high-spec vehicles use to keep safety systems, comfort features and fuel-saving functions running seamlessly. If your car's dashboard is warning of an auxiliary/backup battery fault, this is the type of part you need — confirm the exact match below before ordering.

Key features & benefits

• Keeps critical systems alive: supports the main battery so start-stop, safety devices and comfort electronics never lose power.
• Sealed AGM technology: no free liquid electrolyte — maintenance-free, leak-resistant and vibration-tolerant.
• OE-quality replacement from the world's leading automotive battery brand.
• Compact 9Ah / 130A format designed for dedicated auxiliary battery bays.

⚠ Fitment — please confirm before buying

Auxiliary batteries are vehicle-specific in location and connector style, so always match against your existing auxiliary battery. An AGM auxiliary battery must always be replaced with an AGM auxiliary battery — fitting a different technology risks electrical faults.

Two ways to confirm it fits:

1. Check by registration (VRM): enter your reg in a battery-finder lookup, or send us your reg and we'll check.
2. Match your existing part: compare the part number (509 106 013 / AUX9), voltage, capacity and dimensions (151 × 87 × 106 mm) printed on the auxiliary battery currently fitted.

Specifications

What's in the box

1 × VARTA AUX9 Silver Dynamic Auxiliary AGM battery (509 106 013).

Why buy from Motor Synergy

• Free delivery — with you in 2 days.
• 30 days free returns, hassle-free.
• Real support: unsure about fitment? Contact us before you order and we'll check.

FAQs

What does an auxiliary battery do? Modern high-tech cars often carry two batteries: the main 12V starter battery and a small auxiliary battery that keeps safety and comfort systems powered, especially during start-stop events.

How do I know my car uses one? Check your handbook, or look for a small second battery (often in the boot, engine bay or under a seat). A dashboard warning about the backup/auxiliary battery is the usual sign it needs replacing.

Can I fit any 9Ah battery instead? No — an AGM auxiliary battery must be replaced with an AGM auxiliary battery of matching spec to avoid malfunctions.

Is it hard to fit? Location varies by vehicle; some are simple, some need trim removal. If in doubt, have a garage fit it.

What if it doesn't fit? 30-day free returns — but confirming the part number first is quicker for everyone.