6V Deep Cycle Flooded Marine Battery, 370 Amp Hours, Group 8L16


In stock online.
Store Pickup Only
Model # 15020357 | Mfg # WM8L16 | UPC # 25282164011

A great battery for your house bank or 12V or 24V trolling motor

Lead-calcium batteries deliver more power per pound than competitive dual-purpose batteries. They feature a no-spill design that allows you to heel over to angles up to 45°. Connections are made easy by the “L” type terminals.

For marine uses, our 6V deep cycle flooded batteries are best when wired in series to build banks for 12V—36V applications. These batteries are workhorses; their larger capacity provide the amp-hours needed to be away from the dock for longer periods of time or run your trolling motor for the day.

Manufactured in the U.S. for West Marine by East Penn, one of the most reputable battery companies in the country. Each battery receives over 250 quality control checks to guarantee consistent and superior performance. East Penn’s award winning factory leads the industry in closed loop and sustainable practices. Nearly all of the plastics, lead and acid are recycled, so our batteries are great for your boat and the environment.

Key Features

  • Deep cycle batteries are designed to handle the power drains that other batteries cannot
  • When combined in series they are ideal for 12V. 24V, and 36V trolling motors and 12V and 24V house banks
  • Will serve as an emergency start battery if CCA specification matches that of your engine
  • Enhanced durability design to withstand wear of extended cycling service
  • Superior electrolyte retention prevents dry out and acid leaks
  • Safer to install and transport with no-spill design to prevent leaking acid
  • Lower current resistance separators improve current flow for faster starts
  • Manufactured in the USA


  • Group Size: Group L16
  • Terminal Type: “L” type terminals with 5/15" diameter hole
  • Amp Hours (Ah): 370
  • Cold Cranking Amps (CCA): 740
  • Marine Cranking Amps (MCA): 930
  • Reserve Minutes: 840
  • Weight: 113
  • Dimensions: 11 3/4"L x 7"W x 16 1/2"H
  • Warranty: 12-month free replacement

Core charge will apply to battery purchase if an old 6V battery is not exchanged at the time of purchase.

 WARNING: Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Batteries also contain other chemicals known to the State of California to cause cancer. Wash hands after handling. For more information, go to www.P65Warnings.ca.gov.


6V Deep Cycle Flooded Marine Battery, 370 Amp Hours, Group 8L16

Name Value
Amperage Hours 370
Battery Type Deep Cycle
Group Size Group 8L16
Cold Cranking Amps 740 CCA
Dimensions 7" Width x 16 1/2" Height x 11 3/4" Length
Marine Cranking Amps 930 MCA
Reserve Minutes 840
Type Tapered Stud and Wing Nuts
Voltage 6 Volts DC
Warranty Details One Year Free Replacement


The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.

Related West Advisor Articles


Product Q & A


FREE DELIVERY to West Marine Stores

  • Available for ALL products including hazardous & truck freight items.
  • Ship to over 240 U.S. store locations.
  • Contiguous United States orders arrive in 7 - 10 days.
  • Hawaii and Alaska orders arrive in 10 - 16 days.
  • Expedited shipping is available for an additional fee.
  • Not available in Puerto Rico.

FREE SHIPPING on Orders over $49.00

  • Applicable on orders over $49.00 within the 48 contiguous United States.
  • Does not apply to Truck Freight.
  • No coupon code required.
  • Orders will be delivered within 3 - 7 business days.


We stand behind everything we sell. If at any time your West Marine purchase does not meet your expectations, you can return it for a replacement or refund. If you are a West Advantage Rewards member, you don't even need a receipt - we'll have a record of your purchase. Returns can be made via mail or in person at their nearest store location. If you are not a West Advantage Rewards member, we will first need to verify your purchase by receipt or other method.

We do carry a few items that cannot be returned. This includes: items with expiration dates that have expired such as flares, charts, annual publications; items registered to the user such as boats, motors, EPIRBs, PLBs, SPOT, Class B AIS, life rafts; customized items such as rigging, and boat covers, computer software and electronics charts. Other non-returnable items include carry-on air conditioners, generators and select electronics. We will help you contact the vendor for assistance or repair on product that cannot be returned to West Marine. Items containing hazardous material may only be returned to a West Marine store.

For additional inquiries, you may call Customer Service at 1-800-BOATING (262-8464).