Motobatt MB5U label straight on (MOTOBATT, AGM Technology, MB5U 90CCA 7.0Ah); the red positive post sits top right
MB5U from directly above, posts at either end, shown with the terminal brackets, hex key and screws included with it
NAPA 740-1876 battery replacement shown from a three-quarter angle: yellow Motobatt case, label on the top and the front
Motobatt MB5U label straight on (MOTOBATT, AGM Technology, MB5U 90CCA 7.0Ah); the red positive post sits top right
MB5U from directly above, posts at either end, shown with the terminal brackets, hex key and screws included with it
NAPA 740-1876 battery replacement shown from a three-quarter angle: yellow Motobatt case, label on the top and the front

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NAPA 740-1876 Battery Replacement - Motobatt MB5U Sealed AGM

$67.95
SKU: M518
Availability: Shipping Lead Time is 24 to 48 Hours
Shipping: Free shipping on orders $75 and up
Voltage: 12
Capacity: 7 AH
CCA: 90
Type: AGM
Item Dimensions: (LxWxH) 4.72"x 2.36" x 5.12"
Warranty: 1 Year
NAPA 740-1876 Battery Replacement - Motobatt MB5U Sealed AGM

NAPA 740-1876 Battery Replacement - Motobatt MB5U Sealed AGM

$67.95
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Description  

NAPA 740-1876 Battery Replacement - Motobatt MB5U Sealed AGM

A NAPA 740-1876 battery replacement that's ready to install the day it arrives, with nothing to fill. The 740-1876 is a 12N5-4B size battery. The flooded one we sold under this number shipped dry, with a pack of acid you poured in at the bench. This page now sells the Motobatt MB5U instead, a sealed AGM in the same 120 x 60 x 130 mm case. It costs more, and much of the difference shows before the battery is even in the bike.

Warranty

Warranty. Our free replacement warranty covers every MB5U we sell for one year from delivery.

Open the Box, Fit the Battery

Activated before it ships
Motobatt activates and seals the MB5U at the factory. The label reads no initial charging required, install and go.
Marked non-spillable
The acid is soaked into absorbed glass mat, so there's no free liquid to slop out between the box and the bike.
Same tray, more battery
It sits where the 740-1876 came out, rated 7Ah and 90 CCA against the flooded battery's 5Ah and 40 CCA. You get more stored charge, and more current on hand in the cold.

Filling was also final: once the acid went in, the old battery couldn't come back to us for exchange. It could only ship by ground, too. You can still buy a cheaper flooded 12N5-4B, and an owner who's comfortable pouring acid can run one. We no longer stock them.

  • Fits 4B or 3B wiring - four Quadflex posts, two per polarity, a layout we checked on a unit against both sizes.
  • Comes with terminal hardware - the brackets with their screws, plus a hex key.

Technical Specifications

NAPA 740-1876 Replacement Battery Specifications
Part NumberMotobatt MB5U. Replaces the NAPA 740-1876 (also searched as 740 1876 and 7401876), a 12N5-4B size battery (also searched as 12N54B and 12N5 4B). Terminal layout also suits bikes that took a 12N5-3B (12N53B, 12N5 3B)
Battery TypeSealed, non-spillable AGM (absorbed glass mat), factory activated, maintenance free
Nominal Voltage12V
Nominal Capacity7Ah at the 10-hour rate (7.4Ah at the 20-hour rate)
Cold Cranking Amps90 CCA
TerminalsQuadflex four-post layout, two positive and two negative, with brackets, screws and hex key
Length4.72 inches (120 mm)
Width2.36 inches (60 mm)
Height5.12 inches (130 mm)
Weight5.07 lbs (2.30 kg)
Warranty1-year free replacement through High-Tech Battery Solutions

Where This Battery Is Used

  • Motorcycles listed for a NAPA 740-1876 - or for a 12N5-4B under another brand's number.
  • Home garages not set up for battery acid - the MB5U arrives with none to handle.
Motobatt MB5U product pageThe battery's own page, filed under Motobatt's part number.

Frequently Asked Questions

What does NAPA 740-1876 cross to?

A 12N5-4B, also written 12N54B or 12N5 4B. 740-1876 is NAPA's part number for that size; the Motobatt MB5U is the sealed AGM battery we sell in its place.

Is there any acid to handle when it arrives?

No. The box holds the battery and its terminal hardware; there's no acid pack to store or throw out. Motobatt also marks it as never needing water, so nothing gets added later.

Do I need any tools or parts beyond what's in the box?

No extra parts. A basic wrench or screwdriver usually handles the bike's own hardware, such as a cover or the hold-down strap. If the old lead ends are crusted, clean them before they go on the new posts.

Swapping out a 740-1876?

Read us the label off the old battery, or name the bike, and we'll match it to the MB5U on the call.

Call 1-877-775-4381  ·  battery specialists, not a call center

We list the 740-1876 number only to help you match your old battery. NAPA has no business connection to High-Tech Battery Solutions.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov (State of California only).

Warranty Information  
1-year free replacement warranty through High-Tech Battery Solutions
Shipping & Returns  

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