Start with the job you need the battery to do. A Pro-Guide battery sized to crank an outboard and one sized to run a trolling motor all afternoon can look similar in the tray. The ratings on their labels tell you which job they were built for.
Which Pro-Guide battery should I choose for my boat?
For engine starting, match the engine maker’s specified cranking rating and confirm the battery is approved for that use. Compare cold cranking amps (CCA) with CCA or marine cranking amps (MCA) with MCA. For a trolling motor or fish finder, compare deep-cycle batteries by voltage, capacity, and sustained current. If one battery must do both jobs, choose a dual-purpose model with enough cranking power and accessory reserve. If you regularly fish with the engine off and multiple electronics running, consider separate starting and house batteries so you can keep a reserve for restarting.
Browse marine starting batteries or marine deep-cycle batteries by application.
When should I choose flooded lead-acid, AGM, or lithium?
Flooded lead-acid can be a practical choice for a budget replacement when the battery can stay upright in an accessible, ventilated compartment. AGM eliminates routine watering and can be a convenient choice when the boat is already set up for AGM. LiFePO₄ can cut weight and provide more usable capacity for frequent cycling. If you’re considering lithium for starting, verify the exact battery and engine combination, including the charging system, rather than assuming a lithium deep-cycle model can crank an outboard. Our battery chemistry comparison covers the tradeoffs for each.
How do I choose a trolling motor battery?
Check whether the motor requires 12V, 24V, or 36V. Then check maximum current draw and estimate how long you use the motor at different speeds. For a bank made from multiple batteries, confirm that the manufacturer approves the exact models for the proposed series or parallel wiring. Also measure the tray and check terminal clearance. The case group tells you about fit, while the voltage and current ratings determine whether the battery can do the job.
See lithium trolling motor batteries and compare models for the voltage your motor requires.
Can I keep my onboard charger?
Check the charging profile, voltage, and permitted current for the specific battery. If a boat uses different chemistries or voltages for starting and trolling, confirm that each charger bank supports the battery assigned to it and can be configured independently where needed. Review alternator charging separately. For cold-weather use, confirm the model’s minimum charging temperature and any low-temperature cutoff or heating behavior before making a plan to recharge.
Shop onboard marine chargers or Pro-Guide batteries and chargers. If you’re comparing two models, send us your engine or motor model, the battery SKU, and your charger model so we can help you check fit.
How do I check the Pro-Guide warranty?
Coverage depends on the model and product line. Check how long free replacement applies and whether any prorated coverage follows. Keep the purchase receipt, the model and date code, and a description of the issue. For the written warranty for your purchase or help with a claim, contact Prepper Hideout with the battery or charger SKU.