Wirthco
Wirthco Knob Batt Switch Top Post – 20308
Wirthco Knob Batt Switch Top Post – 20308
SKU:W4820308
In stock
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- Free shipping on $70+
- Ships from US warehouse
- 30-day returns
The Wirthco 20308 is a knob batt switch top post.
Key features
- Battery Disconnect Control: Cut power to your 12 volt system by unscrewing the knob a few turns, and restore the connection by tightening it back down, with no tools required for daily use.
- Heavy-Duty Power Ratings: Rated 500 amps surge and 125 amps continuous at 12 volts, sized to handle typical automotive, marine, RV, and powersports battery loads.
- Easy Negative Post Installation: Designed to mount directly on the negative battery post, with a compact footprint that fits most battery compartments without rerouting cables.
- Removable Knob For Theft Deterrence: The knob can be removed completely to help deter unauthorized starting, making this switch useful for stored vehicles, trailers, boats, and seasonal equipment.
- Retail Pack With Terminal Markers: Retail packaging includes Battery Doctor 20250 battery terminal markers to help identify positive and negative posts during installation and future service.
Before you order
- Compare the connector and the part number on your old part before ordering.
Specifications
| Brand | Wirthco |
|---|---|
| Manufacturer part number | 20308 |
| Part type | Electronic Switch |
| UPC / GTIN | 10054203081 |
| Weight | 0.50 lb |
| Dimensions (L × W × H) | 6 × 4 × 1.4 in |
| Category | Electronics & Audio |
| Condition | New |
| Returns | 30-day returns on unused items |
Questions
What does shipping cost?
Standard shipping is free on orders of $70 or more to the lower 48 states and DC, and $8 below that. Express is $15 at checkout. Orders ship the same business day when placed early in the day, otherwise the next business day; standard delivery takes 3–5 business days. Alaska and Hawaii are charged by weight at checkout.
Can I return it?
Yes — unused items in the original packaging can be returned within 30 days of delivery. A restocking fee may apply; see our refund policy.
Shipping & delivery
Shipping & delivery
Free standard shipping on orders of $70 or more to the lower 48 states and DC; $8 on smaller orders. Express is $15 at checkout; Alaska and Hawaii are charged by weight. Orders ship from the warehouse closest to you — the same business day, or the next business day if ordered late in the day, on a weekend or holiday. Standard delivery takes 3–5 business days. Oversized items (bumpers, running boards, large tonneau covers, some marine equipment) ship LTL freight — we contact you to schedule delivery and a signature is required.
Returns & warranty
Returns & warranty
Unused, uninstalled parts in original packaging can be returned within 30 days of delivery. A restocking fee of up to 20% may apply depending on the product, and return shipping is the buyer’s responsibility unless the item arrived defective, damaged or incorrect. Items marked Final sale can't be returned. If a part fails, contact us with your order number and we'll help with the manufacturer's warranty claim.
Fitment & part numbers
Fitment & part numbers
Verify fitment with the manufacturer part number shown above and your vehicle’s year, make, model and trim. If the listing says “Fits select…”, confirm your exact application before ordering. Not sure? Send us your VIN and the part number and we’ll check it for you.
