Quick Picks:
The 10 Top Battery Tender For Boats Reviews:
SaleBestseller No. 1 
NOCO Genius GEN5X2, 2-Bank, 10A (5A/Bank) Smart Marine Battery Charger, 12V Waterproof Onboard Boat Charger, Battery Maintainer and Desulfator for AGM, Lithium (LiFePO4) and Deep-Cycle Batteries
- Meet the GEN5X2 - Similar to our GENM2, only better. It's 37% smaller and delivers 43% more power. It's one of the best performing onboard marine battery chargers we have ever made.
- Multiple banks - A two-bank onboard battery charger rated a 10-amps - 5-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
- Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
- Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
- Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
SaleBestseller No. 2 
Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation
- All the charging characteristics of the Battery Tender Junior: fully-automated “SuperSmart” charging and maintaining, spark proof, reverse polarity protection, and short circuit protection
- The interior is completely encapsulated, protected from shock, vibration, and moisture by an electrically insulating, thermally conductive, flame retardant, synthetic epoxy resin compound
- This charger is no larger than a standard computer mouse yet packs 800 milliamps of pure constant current charging power and is listed in the California Appliance Efficiency Database
- Includes alligator clips and ring terminals, and is perfect for all outdoor types of ATV's, watercraft, motorcycles, boats, or anywhere water is a threat, including lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell).
- AC Power Cord Length: 6 ft.- 18 AWG; DC Output Cord Length: 4.5 ft. - 18 AWG; DC Output Accessory Length: 1.5 ft.
SaleBestseller No. 3 
Battery Tender 5 AMP/2.5 AMP, 12V Battery Charger and Maintainer: 12V/24V Onboard Marine Battery Charger for Boat Engine - Mountable, Heavy Duty, Weather Resistant Boat Charger - 022-0258-DL-WH
- STAY CHARGED: This ultra tough industrial charger provides a full charge to your machine's battery before switching to float mode to maintain proper voltage levels without overcharging the battery. Ultra Performance for most batteries
- FULLY SELECTABLE: Compatible with AGM, flooded, gel, or lithium (LiFePO4) batteries and easily switchable between 12 volts at 5 amps or 24 volts at 2.5 amps to provide and maintain an optimal charge. 12V and 24V Selectable Charger & Maintainer
- HEAVY DUTY: Made with cast aluminum casing that is shock, vibration, and weather resistant to withstand harsh environments so you can reliably charge your vehicle no matter how cruel the conditions. Weather Resistant IP67 Rating
- EASY TO USE: The versatile charger and maintainer for heavy duty industrial machinery features a low maintenance design and is equipped with integrated mounting capabilities for easy installation.Integrated Mounting Capabilities
- SAFE AND SECURE: Our battery charger and maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power. Charges & Maintains Industrial, Automotive, and Marine Batteries at Optimal Charge
Bestseller No. 4 
Battery Tender DC to DC Power Connector: Trolling Motor Plug for Onboard Marine 12V to 48V DC to DC Power Connection - Weather Resistant DC Plug with 80 AMP Capacity - Quick & Easy Setup -027-0004-KIT
- PREMIUM CONNECTIVITY: The durable Battery Tender DC power connector, trolling motor plug is an onboard connector for 12, 24, 36, and 48-volt DC to DC connections—it’s the perfect fit for battery connections to trolling motors, navigational electronics, or any DC accessory
- BUILT TO LAST: Made from high-strength, corrosion-resistant stainless steel, our power connector is built to be long-lasting, vibration and weather resistant
- MORE POWER, LESS WEIGHT: Compact and non-bulky, our small two-pin battery connector is rated at 80 AMPs continuous service, allowing for a more powerful and continual electrical flow when you need it
- INCLUDES: 2 x 3.25 x 3.5-inch L-shaped connector plug (female) rated at 12, 24, 36, and 48-volt with 80 AMPs continuous service, receptacle (male), gasket, 2 cable cover screws, and linear conversion kit; covered by a 5-year warranty and lifetime customer support
- EASY CONFIGURATION: The unique screw and lock connector is simple to install and provides a secure, convenient connection between your vehicle’s battery and a trolling motor or other DC-powered devices
SaleBestseller No. 5 
Battery Tender 4 Bank Battery Charger and Maintainer, 12 Volt 1.25 AMP for Motorcycles, ATVs, Lawn Mowers
- 4 CHARGING STATIONS: Charge four 12 volt batteries at 1.25 AMPs simultaneously; automatically switches from full charge mode to float charge mode
- BATTERY CHARGING: Charges and maintains batteries for motorcycles, ATVs, personal watercraft, lawn mowers, and dirt bikes
- BATTERY MAINTAINING: Maintains battery charge at the ideal storage voltage for cars, SUVs, pickup trucks, and boats
- SAFETY FEATURES: This battery charger features reverse polarity protection, a 72-hour safety timer shutoff, and is spark proof
- COMPATIBLE BATTERIES: Can be used with AGM, sealed maintenance free, and flooded batteries without the damage caused by trickle chargers
Bestseller No. 6 
Battery Tender 8 Amp, 12V Battery Charger and Maintainer: Switchable 8 AMP and 2 AMP, 12 Volt Automotive Battery Charger - SuperSmart Battery Charger for Cars, SUVs, Trucks, and Boats - 022-0337-DL-WH
- STAY CHARGED: The powerful 12 volt battery charger provides a full charge to your automobile or power sports battery before switching to float mode to maintain proper voltage levels without overcharging the battery
- FULLY SELECTABLE: With the push of a button, choose from 8 amp or 2 amp charging to provide and maintain an optimal charge for vehicles with 12 volt lead-acid, AGM, or lithium (LiFePO4) batteries
- COMPATIBILITY: Provides reliable engine starts and extended battery life to automotive vehicles such as cars, SUVs, trucks, or boats in addition to powersports such as motorcycles, ATVs, and more
- EASY TO USE: A low maintenance design that's quick and simple to use, our versatile automobile charger and maintainer is compact and lightweight to operate everywhere, even in small storage spaces
- SAFE AND SECURE: Our 12v battery charger and maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power
SaleBestseller No. 7 
Battery Tender 5-45 Watt Automatic Solar Charge Controller with LED Indicator, Spark Proof, Short Circuit and Reverse Polarity Protected
- Usable input range between 5-45 Watts
- Battery Tender Solar Controller allows you to convert an existing solar panel into a solar charger using Battery Tender patented Super Smart Charging Algorithm.
- Small and compact charge controller
- Reverse polarity and spark proof operation
- 3 year limited warranty
Bestseller No. 8 
Battery Tender 12V, 75 AMP Engine Start Assist, 20 AMP Battery Booster, and Battery Charger and Maintainer with Battery Monitoring
- ALL IN ONE: Powers your vehicle's battery as a booster or jump starter, fully charges and automatically switches to maintenance mode to keep your battery at an optimal. Wireless connectivity to mobile device via Wi-Fi (point to point and Network) to the Deltran Connected App via mobile device
- 4 FUNCTIONS: Equipped with 4 charging modes (1.25 amp charging, 20 amp boost, 75 amp engine start assist, and power supply) to be the ultimate 12 volt battery charging accessory for every situation
- WIRELESS CONNECTIVITY: Features integrated Wi-Fi that allows you to connect your charger to the internet, so you can stay informed, get alerts, and control your charger from the Deltran Connected app
- VERSATILE COMPATIBILITY: Compatible with standard, AGM, and lithium ion batteries to be ideal for use with a variety of automotive vehicles with different power outputs for every charging situation
- SAFE AND SECURE: Our portable booster protects against short-circuiting and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power
Bestseller No. 9 
NOCO Genius GEN5X3, 3-Bank, 15A (5A/Bank) Smart Marine Battery Charger, 12V Waterproof Onboard Boat Charger, Battery Maintainer and Desulfator for AGM, Lithium (LiFePO4) and Deep-Cycle Batteries
- Meet the GEN5X3 - Similar to our GENM3, only better. It's 37% smaller and delivers 43% more power. It's one of the best performing onboard marine battery chargers we have ever made.
- Multiple banks - A three-bank onboard battery charger rated a 15-amps - 5-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
- Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
- Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
- Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
Bestseller No. 10 
Battery Tender 10 Bank Battery Charger and Maintainer, 12 or 6 Volt 4 AMP for Charging Automotive and Marine Batteries
- 10 CHARGING STATIONS: Charge ten 6 or 12 volt batteries at 4 AMPs simultaneously; automatically switches from full charge mode to float charge mode
- BATTERY CHARGING: Charges and maintains batteries for cars, SUVs, pickup trucks, RVs, campers, motorcycles, ATVs, personal watercraft, lawn mowers, and dirt bikes
- INCLUDED COMPONENTS: This unit comes with 10 alligator clips and a 6-foot AC power cord; charges batteries without the damage caused by trickle chargers
- SAFETY FEATURES: This battery charger features reverse polarity protection, a 25-hour safety timer shutoff, and is spark proof
- COMPATIBLE BATTERIES: Can be used with AGM, standard, GEL, and lithium batteries; charges lithium batteries at 12 volts only
Last update on 2023-03-26 / Affiliate links / Images from Amazon Product Advertising API