• WIRTHCO 20148 Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)
  • WIRTHCO 20148 Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)
  • WIRTHCO 20148 Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)
  • WIRTHCO 20148 Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)
  • WIRTHCO 20148 Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)
  • WIRTHCO 20148 Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)
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WIRTHCO

Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)

Battery Doctor WirthCo Top Post Battery Disconnect Knife Switch, Low Vertical, 5/8 in Post with 5/16-18 Stud and Wing Nut, 250 Amp 12V, 3 x 4 x 2-1/4 in, Made in USA (20148)

W4820148

$64.99
$64.99
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In stock
  • Genuine brand-name parts
  • Ships from US warehouse
  • 30-day returns
  • STOP PARASITIC BATTERY DRAIN - Knife-blade disconnect lets you cut power to the negative battery post in seconds so stored vehicles, RVs, and seasonal equipment hold their charge between uses.
  • HEAVY-DUTY 12V RATING - Rated 250 Amps continuous and 750 Amps surge at 12 Volts, giving the headroom needed for cars, trucks, RVs, boats, and other 12V systems running standard accessory loads.
  • FITS STANDARD TOP POST BATTERIES - Clamps onto a 5/8 in diameter negative top post for a secure cable-clamp connection, with low vertical lever operation for easy reach inside the battery box.
  • EXTRA STUD AND WING NUT CONNECTIONS - Integrated 5/16-18 threaded stud with wing nut accepts ring-terminal leads, so auxiliary accessories, chargers, or parallel battery cables can land on the same disconnect.
  • SECURE AND COMPACT DESIGN - Compact 3 in W x 4 in L x 2-1/4 in H footprint helps deter theft, tampering, and unauthorized use by removing power at the source; made in the USA.
Brand WIRTHCO
Manufacturer part number 20148
UPC / GTIN 10054201483
Weight 0.50 lb
Dimensions (L × W × H) 2.8 × 4.5 × 7 in
Category Electronics & Audio
Condition New — genuine brand-name product
Genuine brand-name product, full manufacturer warranty. Ships from the closest US warehouse — normally within 1–3 business days. Questions before you order? Send us the manufacturer part number above and we’ll confirm. 30-day returns on unused items.

Shipping & delivery

Orders ship from the distributor warehouse closest to you, normally within 1–3 business days of purchase. Standard ground delivery takes 3–7 business days in the continental US; expedited options are shown at checkout. 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

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 supplier, and return shipping is the buyer’s responsibility unless the item arrived defective, damaged or incorrect. Every product carries the full manufacturer warranty. Contact us with your order number to start a return.

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.

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