Marine Batteries & Power
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Featured Brands
- Blue Sea Systems®Contura™ 6-Position Mounting Switch Panel (8260)Contura™ 6-Position Mounting Switch Panel by Blue Sea Systems®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Strict quality control and thorough testingOffered at a reasonable price$16.38
- Blue Sea Systems®HD-Series 32 V DC 500 A 3-Position Gray Tinned Copper Heavy-Duty Selector Battery Switch with AFD (11003)HD-Series 32 V DC 500 A 3-Position Gray Tinned Copper Heavy-Duty Selector Battery Switch with AFD by Blue Sea Systems®. Switches isolated battery banks to all loads. This top-grade product is expertly made in compliance with stringent...Includes AFD (Alternator Field Disconnect)Ignition protected-safe for installation aboard gasoline powered boats$102.74
- Blue Sea Systems®HD-Series 32 V DC 500 A 4-Position Gray Tinned Copper Heavy-Duty Selector Battery Switch (3002)HD-Series 32 V DC 500 A 4-Position Gray Tinned Copper Heavy-Duty Selector Battery Switch by Blue Sea Systems®. Switches isolated battery banks to all loads or combines battery banks to all loads. This top-grade product is expertly made...Make-before-break contact design allows switching between battery banks without power interruptionIgnition protected-safe for installation aboard gasoline powered boats$91.59
- Blue Sea Systems®HD-Series 32 V DC 500 A 4-Position Gray Tinned Copper Heavy-Duty Selector Battery Switch with AFD (3003)HD-Series 32 V DC 500 A 4-Position Gray Tinned Copper Heavy-Duty Selector Battery Switch with AFD by Blue Sea Systems®. Switches isolated battery banks to all loads or combines battery banks to all loads. This top-grade product is...Includes AFD (Alternator Field Disconnect)Make-before-break contact design allows switching between battery banks without power interruption$102.74
- Blue Sea Systems®HD-Series 32 V DC 600 A 2-Position On/Off Gray 1-Circuit Heavy-Duty Battery Switch (3000)HD-Series 32 V DC 600 A 2-Position On/Off Gray 1-Circuit Heavy-Duty Battery Switch by Blue Sea Systems®. Switches a single battery to a single load group. This top-grade product is expertly made in compliance with stringent industry...Ignition protected-safe for installation aboard gasoline powered boatsCase design allows surface or rear panel mounting$87.96
- Blue Sea Systems®HD-Series 32 V DC 600 A 2-Position On/Off Gray Tinned Copper 1-Circuit Heavy-Duty Battery Switch with AFD (3001)HD-Series 32 V DC 600 A 2-Position On/Off Gray Tinned Copper 1-Circuit Heavy-Duty Battery Switch with AFD by Blue Sea Systems®. Switches a single battery to a single load group. This top-grade product is expertly made in compliance with...Includes AFD (Alternator Field Disconnect)Ignition protected-safe for installation aboard gasoline powered boats$100.37
- Blue Sea Systems®ICON Label Battery Switch Kit (7902)ICON Label Battery Switch Kit by Blue Sea Systems®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...18 icon labels for battery switches, use to identify circuitsStrict quality control and thorough testing$9.71
- Blue Sea Systems®M-Series Mini Dual Circuit Plus™ 12 - 24 V DC 65 A Red Add-A-Battery Kit (7649)M-Series Mini Dual Circuit Plus™ 12 - 24 V DC 65 A Red Add-A-Battery Kit (7649) by Blue Sea Systems®. The ADD-A-BATTERY is as simple to operate as an ON-OFF switch, yet effectively manages the switching and charging of two batteries...Simplifies switchingIsolates engine and house circuits$123.25
- Blue Sea Systems®M-Series Mini Dual Circuit™ 32 V DC 300 A 2-Position Red Tinned Copper 2-Circuit Battery Switch (6010)M-Series Mini Dual Circuit™ 32 V DC 300 A 2-Position Red Tinned Copper 2-Circuit Battery Switch by Blue Sea Systems®. Simultaneously switches two isolated battery banks. This top-grade product is expertly made in compliance with...Strict quality control and thorough testingOffered at a reasonable price$49.81
- Blue Sea Systems®M-Series Mini Plus™ 32 V DC 300 A 3-Position Black Tinned Copper 2-Circuit Battery Switch (6011200)M-Series Mini Plus™ 32 V DC 300 A 3-Position Black Tinned Copper 2-Circuit Battery Switch (6011200) by Blue Sea Systems®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a...Make before break contact design allows switching between battery banks without power interruptionStrict quality control and thorough testing$49.81
- Blue Sea Systems®M-Series Mini Plus™ 32 V DC 300 A 3-Position Red Tinned Copper 2-Circuit Battery Switch (6011)M-Series Mini Plus™ 32 V DC 300 A 3-Position Red Tinned Copper 2-Circuit Battery Switch (6011) by Blue Sea Systems®. Simultaneously switches two isolated battery banks or combines battery banks to all loads. This top-grade product is...Make before break contact design allows switching between battery banks without power interruptionStrict quality control and thorough testing$49.81
- Blue Sea Systems®M-Series Mini™ 32 V DC 300 A 2-Position Black Tinned Copper 2-Circuit Battery Switch (6010200)M-Series Mini™ 32 V DC 300 A 2-Position Black Tinned Copper 2-Circuit Battery Switch by Blue Sea Systems®. Simultaneously switches two isolated battery banks. This top-grade product is expertly made in compliance with stringent...Strict quality control and thorough testingOffered at a reasonable price$48.79
- Blue Sea Systems®M-Series Mini™ 48 V DC 300 A 2-Position On/Off Black Tinned Copper 1-Circuit Battery Switch with Key (6005200)M-Series Mini™ 48 V DC 300 A 2-Position On/Off Black Tinned Copper 1-Circuit Battery Switch with Key (6005200) by Blue Sea Systems®. Switches a single battery to a single load group. This top-grade product is expertly made in...Ignition protected-safe for installation aboard gasoline powered boatsCase design allows surface, front panel, or rear panel mounting$38.71
- Blue Sea Systems®M-Series Mini™ 48 V DC 300 A 2-Position On/Off Black Tinned Copper 1-Circuit Battery Switch with Knob (6006200)M-Series Mini™ 48 V DC 300 A 2-Position On/Off Black Tinned Copper 1-Circuit Battery Switch with Knob (6006200) by Blue Sea Systems®. Switches a single battery to a single load group. This top-grade product is expertly made in...Strict quality control and thorough testingOffered at a reasonable price$40.36
- Blue Sea Systems®M-Series Mini™ 48 V DC 300 A 2-Position On/Off Red Tinned Copper 1-Circuit Battery Switch with Key (6005)M-Series Mini™ 48 V DC 300 A 2-Position On/Off Red Tinned Copper 1-Circuit Battery Switch with Key (6005) by Blue Sea Systems®. Switches a single battery to a single load group. This top-grade product is expertly made in compliance...Ignition protected-safe for installation aboard gasoline powered boatsCase design allows surface, front panel, or rear panel mounting$40.36
- Blue Sea Systems®M-Series Mini™ 48 V DC 300 A 2-Position On/Off Red Tinned Copper 1-Circuit Battery Switch with Knob (6006)M-Series Mini™ 48 V DC 300 A 2-Position On/Off Red Tinned Copper 1-Circuit Battery Switch with Knob (6006) by Blue Sea Systems®. Switches a single battery to a single load group. This top-grade product is expertly made in compliance...Ignition protected-safe for installation aboard gasoline powered boatsCase design allows surface, front panel, or rear panel mounting$40.36
- Blue Sea Systems®M-Series™ 32 V DC 300 A 3-Position Black Tinned Copper Selector Battery Switch (6008200)M-Series™ 32 V DC 300 A 3-Position Black Tinned Copper Selector Battery Switch (6008200) by Blue Sea Systems®. Switches isolated battery banks to all loads or combines battery banks to all loads. This top-grade product is expertly...Strict quality control and thorough testingOffered at a reasonable price$48.79
- Blue Sea Systems®M-Series™ 32 V DC 300 A 3-Position Red Tinned Copper Selector Battery Switch (6008)M-Series™ 32 V DC 300 A 3-Position Red Tinned Copper Selector Battery Switch (6008) by Blue Sea Systems®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced...Ignition protected-safe for installation aboard gasoline powered boatsCase design allows surface or rear panel mounting$49.81
- Blue Sea Systems®M-Series™ 32 V DC 300 A 4-Position Red Tinned Copper Selector Battery Switch (6007)M-Series™ 32 V DC 300 A 4-Position Red Tinned Copper Selector Battery Switch by Blue Sea Systems®. Switches isolated battery banks to all loads or combines battery banks to all loads. This top-grade product is expertly made in...Make before break contact design allows switching between battery banks without power interruptionStrict quality control and thorough testing$39.85
- Blue Sea Systems®M-Series™ 32 V DC 500 A Black Tinned Copper Selector Battery Switch (6007200)M-Series™ 32 V DC 500 A Black Tinned Copper Selector Battery Switch by Blue Sea Systems®. Switches isolated battery banks to all loads or combines battery banks to all loads. This top-grade product is expertly made in compliance with...Make before break contact design allows switching between battery banks without power interruptionStrict quality control and thorough testing$39.90
- Blue Sea Systems®M-Series™ Red Battery Spare Locking Switch Key (7903)M-Series™ Red Battery Spare Locking Switch Key (7903) by Blue Sea Systems®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Strict quality control and thorough testingOffered at a reasonable price$4.37
- Blue Sea Systems®M-Series™ Red Battery Spare Switch Key (7900)M-Series™ Red Battery Spare Switch Key (7900) by Blue Sea Systems®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Strict quality control and thorough testingOffered at a reasonable price$6.65
- Blue Sea Systems®ML-RBS 10.1 - 16.5 V DC 500 A Off/On LED Tinned Wire Remote Battery Switch with Manual Control (7713)ML-RBS 10.1 - 16.5 V DC 500 A Off/On LED Tinned Wire Remote Battery Switch with Manual Control by Blue Sea Systems®. 500 Amp magnetic latching switch provides high amperage switching under load, manually or from remote locations. Auto...Manual override knob provides an added level of safety allowing control with or without power and offering LOCKED OFF capability for servicingLED output to remotely indicate switch state - requires optional LED$201.80
- Blue Sea Systems®ML-RBS 18 - 32 V DC 500 A (On)/Off/(An) SPDT Tinned Wire Remote Battery Switch with Manual Control (7702)ML-RBS 18 - 32 V DC 500 A (On)/Off/(An) SPDT Tinned Wire Remote Battery Switch with Manual Control by Blue Sea Systems®. Coil Function Bi-Stable. 500 Amp magnetic latching switch provides high amperage switching under load, manually or...Manual override knob provides an added level of safety allowing control with or without power and offering LOCKED OFF capability for servicingLED output to remotely indicate switch state - requires optional LED$214.09
- Blue Sea Systems®ML-RBS 9 - 16 V DC 500 A (On)/Off/(On) SPDT Tinned Wire Bi-Stable Remote Battery Switch with Manual Control (7700)ML-RBS 9 - 16 V DC 500 A (On)/Off/(On) SPDT Tinned Wire Bi-Stable Remote Battery Switch with Manual Control by Blue Sea Systems®. 500 Amp magnetic latching switch provides high amperage switching under load, manually or from remote...Manual override knob provides an added level of safety allowing control with or without power and offering LOCKED OFF capability for servicingLED output to remotely indicate switch state - requires optional LED$197.61
- Blue Sea Systems®e-Series Dual Circuit Plus™ 12 - 24 V DC 120 A On/Off Add-A-Battery Kit (7650)e-Series Dual Circuit Plus™ 12 - 24 V DC 120 A On/Off Add-A-Battery Kit by Blue Sea Systems®. The ADD-A-BATTERY is as simple to operate as an ON-OFF switch, yet effectively manages the switching and charging of two batteries from a...Simplifies switchingIsolates engine and house circuits$168.59
- Blue Sea Systems®e-Series Dual Circuit Plus™ 32 V DC 350 A 3-Position Red Tinned Copper 2-Circuit Battery Switch (5511e)e-Series Dual Circuit Plus™ 32 V DC 350 A 3-Position Red Tinned Copper 2-Circuit Battery Switch by Blue Sea Systems®. Simultaneously switches two isolated battery banks or combines battery banks to all loads. This top-grade product is...Make-before-break contact design allows switching without power interruptionIgnition protected-safe for installation aboard gasoline powered boats$61.21
- Blue Sea Systems®e-Series Dual Circuit™ 32 V DC 350 A 2-Position Red Tinned Copper 2-Circuit Battery Switch (5510e)e-Series Dual Circuit™ 32 V DC 350 A 2-Position Red Tinned Copper 2-Circuit Battery Switch by Blue Sea Systems®. Simultaneously switches two isolated battery banks. This top-grade product is expertly made in compliance with stringent...Ignition protected-safe for installation aboard gasoline powered boatsCase design allows surface or rear panel mounting$61.21
- Blue Sea Systems®e-Series™ 32 V DC 350 A 3-Position Red Tinned Copper Selector Battery Switch with AFD , 3 Pieces (11001)e-Series™ 32 V DC 350 A 3-Position Red Tinned Copper Selector Battery Switch with AFD, 3 Pieces by Blue Sea Systems®. Switches a single battery to a single load group. This top-grade product is expertly made in compliance with...Includes AFD (Alternator Field Disconnect)Ignition protected-safe for installation aboard gasoline powered boats$51.95
- Blue Sea Systems®e-Series™ 32 V DC 350 A 4-Position Red Tinned Copper Selector Battery Switch (9001E)e-Series™ 32 V DC 350 A 4-Position Red Tinned Copper Selector Battery Switch by Blue Sea Systems®. Switches isolated battery banks to all loads or combines battery banks to all loads. This top-grade product is expertly made in...Make-before-break contact design allows switching between battery banks without power interruptionIgnition protected-safe for installation aboard gasoline powered boats$47.93
If you’re having trouble starting your boat or watercraft, or if you’re not experiencing the running time you used to get with trolling motors or electronics, then you may be due for battery replacement. We have replacement batteries for all marine starting, deep cycle, and electronics applications as well as products to meet all your battery related needs, including AC and solar-powered battery chargers, and inverter/chargers; regulators and isolators to control battery charging from the alternator; cables and mounting hardware; and accessories like terminals, remote panels and temperature sensors.
Two kinds of batteries have traditionally been needed for marine use, batteries that could supply the cranking power to reliably start engines, and batteries that could supply power for long periods without recharging, for trolling motors and to power electronic accessories. Instead of making you choose between a starting and a deep cycle battery we can offer you batteries that combine the best of both worlds. These batteries pack pure lead plates with more surface area into the case for exceptional cranking power and longer cycle life. They’re maintenance free, vibration resistant, and will never leak.
In addition to the above we also have replacement batteries for underwater viewing systems, ice fishing packs and other electronic devices. Like our dual purpose starting/deep cycle batteries, these batteries are maintenance-free and of non-spillable design. The best way to ensure you get long service life from your batteries is with proper maintenance and keeping them fully charged. Since our batteries are maintenance-free you never need to add water, and because they are classified non-spillable, you don’t have to be concerned with electrolyte leaking or out-gassing that can cause cable and terminal corrosion. A battery should be brought back to proper charge level after discharge as soon as possible to prevent sulfation, which can shorten battery life, and we have the chargers for the job.
We have battery charger models appropriate for AGM (Absorbed Glass Mat), gel cell, and flooded cell lead-acid batteries. Our selection includes inexpensive portable AC powered maintenance chargers, battery maintainers that remain connected to the battery, solar-powered chargers, and panel-style, permanently mounted chargers that can safely charge multiple battery banks. We also offer inverter chargers that can charge batteries when connected to AC power at the dock, but also convert DC power to AC to operate common household current powered electronics. We have modified sine wave inverter/chargers that are fine for running lights, electric heaters and similar devices, as well as pure sine wave inverter/chargers necessary for operating more sensitive electronics.
When the boat’s engine is running, the alternator charges the battery. Boats commonly have one battery for starting and one or more additional batteries for powering electrical accessories. Battery isolators and automatic charging relays ensure that all batteries receive current for charging, but isolate the batteries when discharging so a weak battery won’t draw down a fully charged battery. This way a depleted auxiliary battery won’t deprive the starting battery of the cranking power necessary to start the engine. We have a large selection of isolators and automatic charging relays in various amperages and for different numbers of batteries. You’ll also find all the other marine battery necessities on our digital shelves including battery boxes and trays, and battery cables and terminals.