1-Piece 5 A Battery Tender Power Tender 12 V Automatic Battery Charger & Maintainer – Lead-Acid and Lithium Compatible

Recharge and maintain compatible 12 V vehicle batteries with the Battery Tender 5 A Power Tender. Its automatic four-stage charging process moves through initialization, bulk, absorption, and float modes. Once charging is complete, the unit switches to float maintenance and monitors battery voltage without requiring continuous manual adjustment.

Key Features

• 5 A automatic battery charger and maintainer

• Designed for compatible 12 V batteries

• Four-stage charging process

• Initialization mode evaluates the connection and battery

• Bulk mode provides primary charging power

• Absorption mode completes controlled charging

• Float mode maintains proper battery voltage

• Automatically switches to maintenance after charging

• ISM adaptive charging resumes output when voltage drops

• Two LED charging-status indicators

• 72-hour safety timer helps protect weaker batteries

• Spark-proof during initial lead connection

• Reverse-polarity detection

• Compatible with supported lithium batteries

• Compatible with lead-acid battery types

• Supports flooded, AGM, and gel batteries

• Compact design is suitable for storage and travel

• 120 V AC household power input

Specifications

• Brand: Battery Tender

• Product Line: Power Tender

• Product Type: Automatic Battery Charger and Maintainer

• Battery Voltage: 12 V

• Maximum Charging Output: 5 A

• Input Voltage: 120 V AC

• Input Frequency: 60 Hz

• Charging Stages: 4

• Charging Modes: Initialization, Bulk, Absorption, and Float

• Maintenance Mode: Automatic Float

• Adaptive Charging: ISM

• Safety Timer: 72 Hours

• Status Indicators: 2 LED Lights

• Reverse-Polarity Detection: Yes

• Spark-Proof Connection: Yes

• Lead-Acid Compatibility: Flooded, AGM, Gel, and Sealed Maintenance-Free

• Lithium Compatibility: Supported 12 V Lithium Batteries

• Vehicle Compatibility: Cars, Trucks, SUVs, Tractors, Boats, and RVs

• Product Dimensions: Not Specified

• Cord Length: Not Specified

• Model Number: Not Specified

• Warranty: Not Specified

Four-Stage Charging

Initialization

The charger checks the battery connection and initial conditions before applying normal charging output.

Bulk

The unit supplies higher charging current to restore most of the battery’s available capacity.

Absorption

Charging output is controlled as the battery approaches a full charge.

Float

After charging is complete, the Power Tender maintains an appropriate voltage level without continuously applying full output.

Charging time depends on battery capacity, state of charge, condition, chemistry, temperature, and electrical load.

Battery Compatibility

The charger is described as compatible with supported 12 V:

• Flooded lead-acid batteries

• Sealed maintenance-free batteries

• AGM batteries

• Gel-cell batteries

• Lithium batteries approved for this charging profile

Before charging a lithium battery, confirm that its manufacturer permits charging with this Battery Tender model and that the battery has any required battery-management system. Do not use it with an unsupported lithium chemistry.

Vehicle Applications

Suitable battery applications may include:

• Passenger cars

• Pickup trucks

• SUVs

• Tractors

• Boats

• RVs

• Seasonal vehicles

• Stored vehicles

• Other equipment using a compatible 12 V battery

The charger does not provide jump-starting functionality unless specifically stated on its product label.

Monitoring & Adaptive Charging

Two LED indicators communicate charging and connection status. If battery voltage drops under load while connected, ISM adaptive charging can resume charger output to restore the appropriate level.

Refer to the instruction manual for the exact meaning of each LED color, pattern, or flashing sequence.

Safety Features

• Spark-proof during initial connection

• Automatic reverse-polarity detection

• Charging begins only after a proper connection is detected

• 72-hour safety timer

• Automatic transition to float maintenance

• Adaptive output based on battery condition

Safety features do not replace correct battery identification, connection order, ventilation, or supervision during initial setup.

What’s Included

• 1 Battery Tender 5 A Power Tender 12 V charger and maintainer

Charging leads, clamps, ring terminals, storage bags, and other accessories are not itemized in the supplied information. Confirm the sealed package contents before purchase.

Ideal For

• Maintaining stored vehicle batteries

• Recharging compatible 12 V batteries

• Cars and pickup trucks

• SUVs

• Lawn tractors

• Boats

• RVs

• Seasonal vehicles

• Garage and workshop use

• Reducing battery discharge during long-term storage

Why It Stands Out

The 5 A output provides faster charging than a low-current trickle maintainer while still offering automatic float maintenance. Its four-stage process adjusts charging as the battery moves toward full capacity.

Compatibility with several lead-acid types and supported lithium batteries also allows one charger to serve multiple vehicles and equipment applications.

Connection & Use

• Read the instruction manual before use.

• Confirm that the battery is 12 V and uses a supported chemistry.

• Inspect the battery for damage, leakage, swelling, or freezing.

• Turn off the vehicle and all electrical loads.

• Connect the charger leads using the manufacturer’s specified order.

• Confirm that the polarity is correct.

• Plug the charger into a properly grounded 120 V AC, 60 Hz outlet.

• Monitor the status LEDs after connection.

• Disconnect AC power before removing the battery leads.

• Follow the manufacturer’s required disconnection order.

• Store the charger in a clean, dry location.

Safety Information

• Use only with compatible 12 V batteries.

• Do not use on a visibly damaged, leaking, swollen, or frozen battery.

• Charge in a well-ventilated area.

• Keep away from flames, sparks, cigarettes, and ignition sources.

• Do not expose the charger to rain or standing water unless its label specifically permits such use.

• Do not cover the charger during operation.

• Wear suitable eye protection when working near lead-acid batteries.

• Keep children and pets away from the charging area.

• Stop use if the charger, cord, plug, or leads are damaged.

• Follow all vehicle and battery manufacturer instructions.

Frequently Asked Questions

What battery voltage does this charger support?
It is designed for compatible 12 V batteries.

What is its maximum charging output?
The charger provides up to 5 A.

Can it maintain a battery after charging?
Yes. It automatically switches to float mode after the battery reaches a full charge.

Which lead-acid batteries are compatible?
It supports flooded, sealed maintenance-free, AGM, and gel-cell lead-acid batteries.

Can it charge lithium batteries?
It supports compatible 12 V lithium batteries. Confirm the battery chemistry and charging requirements before connecting it.

What does the 72-hour timer do?
It limits extended charging operation to help protect weak or damaged batteries from remaining in an active charging stage indefinitely.

Does it protect against reversed connections?
Yes. It detects reverse polarity and requires a correct connection before supplying charging power.

Can it jump-start a vehicle?
No jump-start function is specified. This product should be treated as a battery charger and maintainer rather than an engine starter.