Top 10 Onboard Battery Maintainer – Automotive Replacement Batteries & Accessories

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1. NOCO

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2-Amp Direct-Mount Onboard Charger, 12V Battery Charger, And Battery Desulfator With Temperature Compensation, NOCO GENIUS2D, Battery Maintainer

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NOCO #ad - Beyond maintenance - it's not a trickle charger, providing intuitive and safe maintenance charging with zero overcharge. A fully-automatic, it's an advanced battery maintainer. Direct-mount - securely mounts nearby the battery with its rugged snap-fit mounting bracket and effortlessly installs into most materials with truss-head self-tapping screws.

Charge dead batteries - charge batteries as low as 1-volt, and AGM, marine, as well as automotive, gel, including flooded, and deep-cycle batteries. Meet the genius2d - the all-new direct-mount onboard battery charger for an under-the-hood battery charging system and year-round battery maintenance. Plus, combine with any of the GCP Series AC Port Plugs for remote charging access. 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.

Compatible with all types of vehicles - add a permanent onboard battery charger to any vehicle to make battery maintenance simple and easy. It monitors your battery 24/7, worry-free battery charger for year-round use. Restore your battery - automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
BrandNOCO #ad
ManufacturerNOCO #ad
Height1.5 Inches
Length5 Inches
Weight0.73 Pounds
Width2.3 Inches
Part NumberGENIUS2D
ModelGENIUS2D
Warranty3-Year Limited Warranty

2. Schumacher

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Motorcycles, Lawn Tractors, Power Sports, Schumacher SC1300 1.5 Amp 6V/12V Fully Automatic Direct-Mount Onboard Under-the-Hood Smart Battery Charger/Maintainer and Battery Detection for Cars

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Schumacher #ad - Reverse hook-up protection ensures charger will not operate if clamps are reversed. Includes double-sided adhesive and cable tie for mounting. Auto voltage detection automatically detects 6 or 12V batteries. Provides 1. 5a to maintain your 6V or 12V battery. Microprocessor-controlled, with multi-stage charging for added precision, safety, and battery life.
BrandSchumacher #ad
ManufacturerSchumacher #ad
Height5.9 Inches
Length9 Inches
Weight0.7 Pounds
Width2 Inches
Part NumberSC1300
ModelSC1300
WarrantyLIMITED WARRANTY

3. NOCO

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1-Bank, 4-Amp 4-Amp Per Bank Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger And Battery Maintainer, NOCO Genius GENM1

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NOCO #ad - Rugged and waterproof construction capable of submersion down to 3-meters and rated IP68 and NEMA 6P. Advanced safety protection featuring spark-proof technology, thermal, plus reverse polarity, ignition, and overcharge protection. A 4 amp 4 amp per bank on-board battery charger for charging and maintaining one 12-volt battery. 410, plus backed by a 5-year. One of the most advanced battery chargers in its class, which is certified to UL1236, ISO 8846, 33 CFR 183. Safely charge all types of lead-acid batteries from 20-120Ah, gel, including wet, AGM, and deep-cycle batteries.
BrandNOCO #ad
ManufacturerNOCO #ad
Height3.8 Inches
Length6.6 Inches
Weight3.3 Pounds
Width2.2 Inches
Part NumberGENM1
ModelGENM1
Warranty3-Year Limited

4. NOCO

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NOCO Genius GENM2, 2-Bank, 8-Amp 4-Amp Per Bank Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger And Battery Maintainer

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NOCO #ad - Advanced safety protection featuring spark-proof technology, ignition, thermal, plus reverse polarity, and overcharge protection. Built-in battery desulfator to recover worn-out batteries.

Saltwater-tested to combat corrosion. One of the most advanced battery chargers in its class, 33 CFR 183. 410, which is certified to ul1236, ISO 8846, plus backed by a 5-year. An 8 amp 4 amp per bank on-board battery charger for charging and maintaining two 12-volt batteries independently. Safely charge all types of lead-acid batteries from 20-120ah, AGM, including wet, gel, and deep-cycle batteries. Rugged and waterproof construction capable of submersion down to 3-meters and rated ip68 and NEMA 6p.
BrandNOCO #ad
ManufacturerNOCO #ad
Height5.5 Inches
Length7.9 Inches
Weight5.8 Pounds
Width2.2 Inches
Part NumberGENM2
ModelGENM2
Warranty3-Year Limited

5. Schumacher

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Schumacher SE-1-12S 1.5A 6/12V Fully Automatic Battery Maintainer

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Schumacher #ad - Rugged molded plastic case resists gasoline, solvents, water, oil, and acid. Plugs into an electrical wall outlet. Multi-stage charging for added precision, safety, and battery life.

Molded with plastic weather proof case. Microprocessor controlled to automatically adjust the amperage rate to charge and maintain. Can install next to the battery on automobiles, golf carts, boats, tractors, and other equipment.11. 5-amp charger. Specially designed for vehicles in storage and cold weather battery maintenance for motorcycle, power sport, and car batteries. Features float-mode monitoring, reverse hook-up protection, and auto-voltage detection. Has reverse polarity protection.
BrandSchumacher #ad
ManufacturerSchumacher #ad
Height9 Inches
Length2 Inches
Weight0.25 Pounds
Width8 Inches
Part NumberSE-1-12S
ModelSE-1-12S
Warranty2 year limited warranty

6. Battery Tender

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Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation, Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor

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Battery Tender #ad - All the charging characteristics of the Battery Tender Junior: fully-automated “SuperSmart” charging and maintaining, spark proof, reverse polarity protection, and short circuit protection.18 awg; dc output accessory Length: 1. 5 ft. It incorporates highly efficient surface mount technology electronic components.

Includes alligator clips and ring terminals, or anywhere water is a threat, boats, including lead-acid, watercraft, motorcycles, and is perfect for all outdoor types of ATV's, 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. 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. Solid new addition to the Battery Tender family of charger products.

The interior is completely encapsulated, thermally conductive, protected from shock, and moisture by an electrically insulating, flame retardant, vibration, synthetic epoxy resin compound. It's tough, and a strong, affordable, innovative battery charging solution. The interior is completely encapsulated, and moisture by an electrically insulating, thermally conductive, protected from shock, flame retardant, UL recognized, vibration, synthetic epoxy resin compound. This compact 800 ma battery charger has all the charge characteristics of its cousin the Battery Tender Junior.
BrandBattery Tender #ad
ManufacturerBattery Tender #ad
Height10 Inches
Length10 Inches
Weight0.12 Pounds
Width4 Inches
Part Number022-0150
Model022-0150
Warranty3 years

7. ProMariner

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ProMariner 12 amp ProSport Gen 2 Battery Charger 2, bank; 12/24V

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ProMariner #ad - The result is faster, more efficient charging. The 12/24v, 12 amp, 2 battery bank proSport 12 waterproof battery charger delivers fast efficient charging in a lightweight design. Distributed on demand technology utilizes 100% of the available charging amps and automatically distributes charge amongst all the batteries as needed.

During short or long-term storage, ProSport automatically reconditions all batteries on board once a month for maximum battery life and performance. Advanced technology eliminates time consuming troubleshooting by clearly indicating system and battery connections are OK or if a fault is present on a specific battery bank.

Compact and rugged aluminum design, overload, over-temperature, dual in-line DC safety fuses for trolling motor and house battery banks. Built-in over-voltage, reverse polarity and ignition protection. Digital led display and battery type selector: LED indicators for Charging, Conditioning and Auto Maintain modes in addition to AC power and selected battery type.
BrandProMariner #ad
ManufacturerAcr Electronics #ad
Height11 Inches
Length7 Inches
Weight4 Pounds
Width9 Inches
Part Number43012
Model43012

8. Guest

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120V Input, 1 Bank, Guest 2708A ChargePro On-Board Battery Charger 5A / 12V

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Guest #ad - For all 12 volt flooded and AGM lead acid batteries. 100% waterproof ip67 and shock resistant for all fresh and saltwater applications. In-line fuses for maximum DC wire protection. 2 year warranty. 12v 8 amp 2 bank on-board battery charger. Built-in safety: reverse polarity, over-voltage, over-current, over-temperature and ignition protection. Dedicated battery charging, sensing and control per bank.
BrandGuest #ad
ManufacturerMARINCO #ad
Height9 Inches
Length7.5 Inches
Weight3.2 Pounds
Width2.4 Inches
Part Number2708A
Model2707A

9. NOCO

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Battery Maintainer, And Battery Desulfator With Temperature Compensation, 6V And 12V Battery Charger, 1-Amp Fully-Automatic Smart Charger, NOCO GENIUS1

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NOCO #ad - Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts. Meet the genius1 - similar to our g750, just better. It's the all-in-one solution - battery charger, battery maintainer, trickle charger, plus battery desulfator.

A fully-automatic, worry-free battery charger for everyday use - 24/7 - with zero overcharge. Beyond maintenance - it's not just a trickle charger, it's an advanced battery maintainer. Restore your battery - automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life. Compatible with all types of vehicles - charge and maintain cars, ATVs, lawn tractors, trucks, SUVs, classic cars, boats, lawnmowers, PWCs, motorcycles, and more.

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. Do more with genius - designed for 6-volt and 12-volt lead-acid automotive, marine, and maintenance-free, and deep-cycle batteries, including flooded, AGM, gel, plus lithium-ion batteries. It's 35% smaller and delivers 35% more power.
BrandNOCO #ad
ManufacturerNOCO #ad
Height6.73 Inches
Length3.43 Inches
Weight0.95 Pounds
Width4.02 Inches
Part NumberGENIUS1
ModelGENIUS1
Warranty3 year limited

10. NOCO

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Battery Maintainer, NOCO GENIUS10, 6V And 12V Battery Charger, 10-Amp Fully-Automatic Smart Charger, And Battery Desulfator With Temperature Compensation

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NOCO #ad - Do more with genius - designed for 6-volt and 12-volt lead-acid automotive, gel, AGM, including flooded, and deep-cycle batteries, and maintenance-free, marine, plus lithium-ion batteries. Compatible with all types of vehicles - charge and maintain cars, SUVs, ATVs, motorcycles, lawnmowers, lawn tractors, classic cars, boats, trucks, PWCs, and more.

A fully-automatic, worry-free battery charger for everyday use - 24/7 - with zero overcharge. 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. Beyond maintenance - it's not just a trickle charger, it's an advanced battery maintainer. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.

Start dead batteries - safely jump start a dead battery in seconds with this compact, yet powerful, 1000-amp portable lithium car battery jump starter pack - Up to 20 jump starts on a single charge - and rated for gasoline engines up to 6 liters and diesel engines up to 3 liters. Charge dead batteries - charges batteries as low as 1-volt. Restore your battery - automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
BrandNOCO #ad
ManufacturerNOCO #ad
Height9.1 Inches
Length4.41 Inches
Weight0 Pounds
Width4.48 Inches
Part NumberGENIUS10
ModelGENIUS10
Warranty3 year limited