Mobile Marine Battery Replacement in Siesta Key, FL
Siesta Key is famous for its quartz-sand beach, but the island also has a big boating community on its canals and the bay side.
Marine Battery Source installs marine batteries in Siesta Key and the rest of Sarasota County. You pick the battery and we install it at the boat, whether it sits at a dock, on a trailer in the driveway or at a ramp. To have us install the battery, add installation on the product page for a flat $99 per battery ($249 for a 24V or 36V lithium bank). There is no core charge on a lead-acid battery when we install it and haul the old one away.
You can shop lithium, AGM and lead-acid or house bank batteries online and add installation on the product page.
Fishing and boats in Siesta Key
Big Pass and the beaches hold snook and tarpon in season, and the bays hold trout and redfish. Pontoons and deck boats head to the Big Pass sandbar on weekends, and bay boats and center consoles fish both inside and out.
Siesta Key waterways, ramps and marinas
Big Pass at the north end separates Siesta Key from Lido Key and leads to the Gulf. Roberts Bay and Little Sarasota Bay lie on the island’s east side, and Turtle Beach Park near the south end sits on the Blind Pass Lagoon. Many homes are on canals that open into Roberts Bay.
Battery types and sizes for Siesta Key
Pontoons and tritoons
Pontoon owners in Siesta Key often ask for more runtime for speakers and lights without giving up a reliable start. A 12V 100Ah lithium battery as a house battery, paired with a dual-purpose AGM for cranking, is a simple and popular setup. If you prefer one battery, choose a dual-purpose model with enough cranking amps for your outboard.
Flats skiffs and bay boats
In Siesta Key, a typical inshore setup is a cranking battery for the outboard, two or three deep-cycle batteries for a 24V or 36V trolling motor, and an onboard charger to bring them all back overnight. Lithium is the popular upgrade because it holds full thrust until it is nearly empty and recharges quickly, but a good AGM deep-cycle battery is still a solid, lower-cost choice.
Center consoles and offshore boats
Center consoles that run offshore from Siesta Key usually have one cranking battery per engine plus a house battery for electronics, pumps and lights. For cranking, a Group 27 or 31 AGM with high marine cranking amps is the common choice. A lithium dual-purpose battery like the EPOCH 172Ah can serve as a house battery and an emergency start, and it weighs a fraction of an equivalent AGM.
Heat, salt and battery care in Siesta Key
Island boats that sit on lifts for weeks while owners are away need a battery that holds its charge. Lithium self-discharges much more slowly than lead-acid.
There is no real off-season here, so batteries work year round. The bigger risk is heat: a battery in a closed hull or a sunny driveway in July ages much faster than one kept cool. Charge after every trip, keep terminals clean and coated, and turn off the battery switch when the boat sits.
Florida’s Gulf coast is hard on batteries for two reasons: heat and salt. Battery life drops quickly when a lead-acid battery sits above 90°F, and salt air corrodes terminals and cables. Sealed AGM and lithium batteries resist both better than flooded batteries, and none of them need water topping.
How it works
- Text us at (954) 743-0000 or order online. A photo of your current battery label and battery compartment helps us confirm the right size.
- Add installation on the product page; it’s available for ZIP codes in our installation area, including 34242.
- We’ll reach out to schedule the installation at a time that works for you. Installation is a flat $99 per battery ($249 for a 24V or 36V lithium bank); add it on the product page when you order.
- We install at your dock, ramp or driveway and take the old batteries with us, so there’s no core charge.
Recommended products
Good starting points for Siesta Key boats, all currently in stock:
- Dakota Lithium DL+ 12V 60Ah Dual Purpose, 1000 CCA LiFePO4 Battery (12V 60Ah LiFePO4, 1000 CCA, Group 24 footprint, 16.5 lb)
- EPOCH 36V 50Ah Essential Series LiFePO4 Battery (1.92kWh) (36V 50Ah LiFePO4, Group 31 footprint, 35 lb, internal heating for cold charging)
- Interstate 31M-AGM 12V Group 31M AGM Dual Purpose Marine Battery – 925 CCA (12V 100Ah AGM, 925 CCA, Group 31M footprint)
- Interstate 27M-AGM-A 12V Group 27M AGM Dual Purpose Marine Battery – 750 CCA (12V 90Ah AGM, 750 CCA, Group 27M footprint)
- Interstate LI31M36V50 36V 50Ah Group 31M Lithium Marine Battery (36V 50Ah LiFePO4, Group 31M footprint)
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Dakota Lithium
Dakota Lithium DL+ 12V 60Ah Dual Purpose, 1000 CCA LiFePO4 Battery
$599.00or 4 interest-free payments of $149.75
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EPOCH
EPOCH 36V 50Ah Essential Series LiFePO4 Battery (1.92kWh)
$749.00or 4 interest-free payments of $187.25
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Interstate
Interstate 31M-AGM 12V Group 31M AGM Dual Purpose Marine Battery – 925 CCA
$459.95or 4 interest-free payments of $114.99
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Interstate
Interstate 27M-AGM-A 12V Group 27M AGM Dual Purpose Marine Battery – 750 CCA
$279.95or 4 interest-free payments of $69.99
FAQ
How much is installation?
Installation is a flat $99 per battery ($249 for a 24V or 36V lithium bank), and you can add it on the product page when you order. Questions about your boat’s setup? Text us at (954) 743-0000.
Do you install batteries in Siesta Key?
Yes. Siesta Key is inside our installation area, which runs from Venice to Gainesville, FL. Installation is a flat $99 per battery ($249 for a 24V or 36V lithium bank), added when you order on the product page.
Can you install lithium batteries?
Yes, we install lithium (LiFePO4), AGM and flooded batteries for a flat $99 per battery ($249 for a 24V or 36V lithium bank). Add it on the product page when you order, or text us at (954) 743-0000 with questions. If you’re switching to lithium, check that your charger has a lithium profile; we sell chargers that do.
What should I have ready?
Make sure we can reach the battery compartment and that the boat is accessible at the dock, ramp or driveway. A photo of the current battery label helps us bring the right size.
How do I set up a time?
Text us at (954) 743-0000. Tell us your ZIP code, the boat and where it is, and we’ll set up a time with you. To book installation, add it on the product page for a flat $99 per battery ($249 for a 24V or 36V lithium bank).
We also deliver nearby
See all towns in Sarasota County, or the full Florida mobile service area. Details on shipping and freight are on our shipping page, and our local install page explains how installation works (a flat $99 per battery, $249 for a 24V or 36V lithium bank).