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Marine Battery Buyers Guide

A boat-marine-ship will use two different types of batteries:
1.  A marine starting battery is used to turn over the boats engine.  These batteries come in various sizes depending on how many CCA (cold cranking amps) or Marine Cranking Amps MCA the engine needs to crank.  (Click to See Battery Terminology & Definitions)
2. A deep cycle battery sometimes called a “house battery” is used to power the lights, pumps, instruments & navigation.

  • Starting batteries for marine range from relatively small 12 volt group size 24 to large 12 volt 8d batteries weighing 120lbs each.
  • AGM and Gel batteries are popular with boat owners because they are sealed and don’t require regular water level maintenance.
    Because starting batteries have thinner plates than 6 volt deep cycle batteries, deep discharging the 12 volt battery damages the plates and reduces the batteries life cycles.
    Starting batteries should never be used for deep cycle applications.
  • 12 volt Dual Purpose / Marine Batteries are a mix of starting and deep cycle battery properties.  Use for light deep cycle applications only.
  • Deep cycle 6 volt batteries have thicker plates and are able to deliver long term energy. If you’re cruising long range, you will get more available power with two or four 6 volt batteries.  (See wiring diagram for 6 volt batteries)
  • If you are looking for a comprehensive guide to marine batteries, David Pascoe as everything you need to know in one article.
  • To avoid annual battery replacement, deep cycle batteries will perform best when charging is completely reliant on engine alternators since cranking batteries do not tolerate deep discharges well. Further, if you’re going offshore where there may be high demand on bilge pumps, BEWARE that cheap automotive batteries aren’t going to run your pumps for very long, particularly after engine failure. Offshore operators should use higher capacity deep-cycle batteries.

 

Battery Size Group 24 Deep Cycle and Starting Battery For Sale
12 volt Centennial Brand Marine Batteries – Deep Cycle 12 volt Battery for Boat Engine and Electronic Application

12 Volt Marine Deep Cycle-Starting Battery – Maintenance Free Battery
Group Size 24
Length: 11″  Width:  6.87″  Heigth: 9.5″
75 ah, 155 reserve capacity, 600 CCA, 750 MCA

*New Centennial DC24MF 12V Batteries for Sale: $85 ea

*(Cores are required to void core charge of $15)

Centennial 12 volt DC24MF Maintenance Free Marine Battery

Battery Size Group 27 Deep Cycle and Starting Battery For Sale
12 volt Centennial Brand Marine Batteries - Deep Cycle 12 volt Battery for Boat Engine and Electronic Application

12 Volt Marine Deep Cycle-Starting Battery - Maintenance Free Battery
Group Size 27
Length: 12.6″  Width:  6.87″  Heigth: 9″
90 ah, 180 reserve capacity, 700 CCA, 875 MCA

*New Centennial DC27MF 12V Batteries for Sale: $95 ea

*(Cores are required to void core charge of $15)

Battery Boat Delivery & Install Service Available

 

Centennial 12 volt DC27MF Maintenance Free Marine Battery

Battery Size Group 30 Deep Cycle Battery
12 Volt Trojan Marine Deep Cycle Battery

Group Size 30
Length: 13 15/16″  Width:  6 3/4″  Heigth: 10 1/16″
130 ah, 225 reserve capacity, 665 CCA

*New Trojan 30XHS 12V Battery for Sale: $175 ea

*(Cores are required to void core charge of $15)

Battery Home Delivery & Install Service Available

 

 

Trojan 30XHS Marine Battery – GEM Car Battery

 

12 Volt Trojan Marine Deep Cycle Battery
Group Size 27
Length: 13 15/16″  Width:  6 3/4″  Heigth: 9  7/8″
130 ah, 225 reserve capacity, 665 CCA

*New Trojan SCS225 12V Battery for Sale: $175 ea

*(Cores are required to void core charge of $15)

Battery Home Delivery & Install Service Available

 

Trojan-SCS225 12 volt Deep Cycle Battery

Trojan-SCS225 12 volt Deep Cycle Battery

Battery Size Group 4D Deep Cycle and Starting Battery For Sale
12 volt Centennial Brand Marine Batteries - Deep Cycle 12 volt Battery for Boat Engine and Electronic Application

12 Volt Marine Deep Cycle-Starting Battery
Group Size 4D
Length: 20 3/4″  Width:  8 3/4″  Heigth: 9 7/8″
165 ah, 400 reserve capacity, 1050 CCA, 1315 MCA

*New Centennial DC4D 12V Battery for Sale: $175 ea

Deep Cycle 165 ah 4D Battery

Deep Cycle 165 ah 4D Battery

Battery Size Group 8D Deep Cycle and Starting Battery For Sale
12 volt Centennial Brand Marine Batteries - Deep Cycle 12 volt Battery for Boat Engine and Electronic Application

12 Volt Marine Deep Cycle-Starting Battery
Group Size 8D
Length: 20 3/4″  Width:  11 1/8″  Heigth: 9 7/8″
240 ah, 450 reserve capacity, 1200 CCA, 1500 MCA

*New Centennial DC8D 12V Battery for Sale: $185 ea

Centennial 12 volt Marine Deep Cycle Battery - 240 ah

8D 12 volt Marine Deep Cycle Battery – 240 ah

 

 

Battery Boat Delivery & Install Service Available

 

Call or Text 619-315-5604
Email: SanDiegoBattery@gmail.com
El Cajon Battery Shop – 1997 Friendship Dr Suite F, 92020


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