Battery Tender 021-0144 Battery Tender Plus 6V Battery Charger

by Battery Tender

Product Features

• Spark proof and reverse polarity protected; unit includes a quick connect harness for use in hard to reach areas
• Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell)
• Complete 4-step charging program (initialization, bulk charge, absorption mode and float mode) allows for optimization of battery power, without overcharging
• Automatically switches to float/maintenance voltage after fully charging the battery
• 10-year limited warranty

Product Details

• Product Dimensions: 11 x 4 x 11 inches ; 2 pounds
• Shipping Weight: 2.5 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000NCOKNI
• Item model number: 021-0144
• Average Customer Review: 4.7 out of 5 stars  See all reviews (21 customer reviews)
• Amazon Best Sellers Rank: #10,584 in Automotive (See Top 100 in Automotive)
  • #62 in Automotive > Tools & Equipment > Jump Starters, Battery Chargers & Portable Power > Battery Chargers

Product Description

From the Manufacturer

The Battery Tender Plus 6-volt/1.25-amp Battery Charger is the convenient solution to the challenge of keeping vehicle batteries optimally powered when not in use. It is able to charge any lead-acid battery, including standard and sealed AGM and Gel Cell battery types and is also designed to be easy to use in difficult spaces, to utilize a 4-step charging program and safely function in a fully automatic mode. Taken together this makes the Battery Tender Plus 6-volt/1.25-amp Battery Charger an excellent means of ensuring that your battery is fully charged and ready to go when you are. 4-step charging with automatic float mode. View larger. Advanced charging system lets you charge any lead acid battery, including AGM and gel cell. View larger. Easy to use functionality. View larger.   Safe, 4-step Battery Charging The Battery Tender Plus 6-volt/1.25-amp Battery Charger is much more than a trickle charger. Powered by BTP microprocessor technology, it has a "brain". Utilizing a 4-step charging program (initialization, bulk charge, absorption mode and float mode), it allows you to simply connect the charger to a battery, either in or out of a vehicle, and forget about it until you are ready to put the battery to work. Like all Battery Tender chargers, at the end of the regular charger cycle the it automatically switches its output voltage to a safe, storage or float level that eliminates the need to worry about the damaging effects of overcharging, and the resulting need to check on the condition of the battery. If or when the battery voltage drops too far under load, output power resumes and the charging cycle begins again. The unit also features sparkproof connectors, short circuit and reverse polarity protection, an easy to understand charging status LED indicator, a quick connect harness for use in hard to reach areas and almost no current draw from batteries connected to it. Key Features: Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell). Complete 4-step charging program (initialization, bulk charge, absorption mode and float mode). Automatically switches to float/maintenance voltage after fully charging the battery. If the battery voltage drops too far under load, full charger output power resumes. Temperature compensated to ensure optimum charge voltage according to ambient temperature. Solid state two color LED indicates stage of charger. Spark proof and reverse polarity protected. Includes quick connect harness for use in hard to reach areas. 10 year warranty. Charger Models Output Voltage Output Current Charging Software*/ Battery Type AC Voltage/ Frequency Input (Volts) (Amps) Battery Tender Junior 6V Battery Charger 6V 0.750A 3 Step STD & AGM 120 VAC, 60 Hz Battery Tender Junior 12V Battery Charger 12V 0.750A 4 Step STD & AGM 120 VAC, 60 Hz Waterproof 800 12V Battery Charger 12V 0.800A 3 Step STD & AGM 100 to 240 VAC, 50/60 Hz Battery Tender Plus 6V Battery Charger 6V 1.25A 4 Step STD & AGM 120 VAC, 60 Hz Battery Tender Plus 12V Battery Charger 12V 1.25A 4 Step STD & AGM 120 VAC, 60 Hz Battery Tender Plus 12V Battery Charger (Gel Cell) 12V 1.25A 4 Step STD & AGM or GEL 120 VAC, 60 Hz Battery Tender Twin 800 12V Dual Battery Charger 12V 0.800A 3 Step STD & AGM 100 to 240 VAC, 50/60 Hz Battery Tender 12V 2-Bank Battery Management System 12V 1.25A 3 Step STD & AGM 100 to 240 VAC, 50/60 Hz Battery Tender 12V 4-Bank Battery Management System 12V 1.25A 4 Step STD & AGM 100 to 240 VAC, 50/60 Hz Battery Tender 12V 5-Bank Battery Management System 12V 2.0A  4 Step STD & AGM 120 VAC, 60 Hz Battery Tender 12V 10-Bank Battery Management System 12V 2.0A  4 Step STD & AGM 120 VAC, 60 Hz *Note: All Deltran battery chargers will charge all types of lead acid batteries: either flooded (standard STD), sealed maintenance free Absorbed Glass Mat (AGM), or sealed maintenance free gelled electrolyte (GEL) batteries. However, for optimum battery performance in deep cycle applications (for example, running a trolling motor), it is best to chose the Deltran charger that has the charging software specifically designed for the battery type. Fortunately, since the technical staff at Deltran has developed charging software that works equally well for both STD & AGM batteries, the only choice to be made is between 2 models: either STD & AGM or GEL software. 10-Year Limited Warranty Deltran provides a limited 10-year warranty on its Battery Tender Plus 6-volt/1.25-amp Battery Charger to the original purchaser based on defective material or workmanship. Warranty is void in cases of product misuse, disassembly or modification. Other details regarding warranty limitations and procedures are contained in the Deltran Battery Tender Charger's general limited warranty information sheet enclosed with this product.

Product Description

BatteryTender Plus is one of the most advanced charger/maintainers on the market and is especially designed for today's sealed lead acid batteries. The Battery Tender Plus uses micro-processor technology in a four-stage charging profile to charge, improve, and float your battery, so it will be ready when you are. Constant current charging and regulated voltage patterns allow the battery to be recharged fully and safely without the fear of overcharging.

Customer Reviews

Most Helpful Customer Reviews

2 of 2 people found the following review helpful:

5.0 out of 5 stars Great 6V Charger, September 20, 2009

By 

Gallorette (Howell, NJ. United States) - See all my reviews

Amazon Verified Purchase

This review is from: Battery Tender 021-0144 Battery Tender Plus 6V Battery Charger (Misc.)

I use this charger to keep the battery in my 1931 Model A fully charged at all times. The eyelet harness that attaches to the battery cables permanently is great as the battery in this car is under the wood floorboards and is hard to access. Now after a ride I just open the hood and plug the Tender harness in and its good to go. Always keeps the battery in good shape.

1 of 1 people found the following review helpful:

4.0 out of 5 stars Great, March 16, 2009

By 

krmitbug - See all my reviews

Amazon Verified Purchase

This review is from: Battery Tender 021-0144 Battery Tender Plus 6V Battery Charger (Misc.)

The unit is small...works great... I no longer have to worry if my 52 chevy will start

3 of 4 people found the following review helpful:

5.0 out of 5 stars Monitored Battery Charging, July 9, 2008

By 

Kirk Perry "Plumber and VT" (S. Calif.) - See all my reviews
(REAL NAME)   

This review is from: Battery Tender 021-0144 Battery Tender Plus 6V Battery Charger (Misc.)

A Battery Tender will constantly maintain a battery without the damaging effects of a "trickle charger". Full charging initially at 1.25 amps (7.25 volts), the charger will switch to a float-charging mode of 6.8 volts to monitor a 6-volt battery. When the battery is accepting only 0.5 amps, the charger's float mode will decrease both amps and voltage. The amp rate will drop to virtually no current (0.10 milliamps), and the voltage rate will drop to 6.8 volts.
~ The "gassing point" of a 6-volt battery is 6.9 volts. Therefore, applying any voltage greater than 6.9 volts for an extended period of time will overheat the battery and warp the separator plates, permanently damaging the battery.~
(Note: This last paragraph above is the diagnosis for why 99% of all 6 or 12 volt motorcycle batteries fail after only a short life. People unknowingly use a standard 6 or 12 volt battery charger on their new battery - which overheats the battery and permanently warps the separator plates. Use a Battery Tender from day one and your battery will outlive it's warranty period.)

I also recommend using "Charge It"(AGL890277Y), a cadmium additive from J.C. Whitney.

Directions for 3-cell, 6-volt M/C batteries:
"Use 1/3 of a 2.5 oz. bottle of "Charge It" into each of the three battery cells BEFORE the acid (electrolyte) is installed. Each cell receives 0.833 fluid ounces of "Charge It" and 7.167 ounces of acid.
Note: By adding "Charge It" into the battery first, you will only have to fill the battery with acid up to the upper level line, instead of having to measure exacting amounts of each." - 1941-1959 Mechanics & Owners Guide to Harley-Davidson OHV Big Twins - Vol. 1