Battery Tender 021-0128 Battery Tender Plus 12V Battery Charger

Features

Solid state two color LED indicates stage of charger; 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) that maintains batteries at full charge without overcharging via its 4-step charging system

Automatically switches to float/maintenance mode voltage after fully charging the battery

Temperature compensated to ensure optimum charge voltage according to ambient temperature, and spark proof and reverse polarity protected; 10-year limited warranty

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Amazon.com Product Description

The Battery Tender Plus 12-volt/1.25-amp Battery Charger is the convenient solution to the challenge of keeping 12-volt 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 12-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. The 4-step charge cycle detailed. View larger. Safe, 4-step Battery Charging The Battery Tender Plus 12-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. 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 12-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 the most advanced charger/maintainer on the market specially designed for today's sealed lead acid batteries. The BT Plus uses micro-processor technology in a four stage charging profile to charge, improve, and float your battery so it is ready when your are. Constant current charging and regulated voltage patterns allow the battery to be recharged fully and safely without the fear of overcharging.

• Binding: Misc.
• Brand: Deltran
• Color: Black
• EAN: 0734357001280
• Feature
  • Solid state two color LED indicates stage of charger; 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) that maintains batteries at full charge without overcharging via its 4-step charging system
  • Automatically switches to float/maintenance mode voltage after fully charging the battery
  • Temperature compensated to ensure optimum charge voltage according to ambient temperature, and spark proof and reverse polarity protected; 10-year limited warranty
• Label: Deltran
• Manufacturer: Deltran
• Model: 021-0128
• MPN: 210128
• Package Quantity: 1
• Product Group: Automotive Parts and Accessories
• Product Type Name: AUTO_ACCESSORY
• Publisher: Deltran
• Release Date: 2006-12-01
• Size: 12V/1.25A
• Studio: Deltran
• UPC: 734357001280

don't leave your battery sit without one, 2010-03-11;   By: J. Cohen(Franklin, NC)
I own two of these units, one dual bank charger and one Deltran 5 amp waterproof charger. If you need your boat, motorcycle or power equipment to start after storage then this is the maintainer. Works great and keeps batteries at 100%. I rotate mine from battery to battery so I have gotten extra battery hookups. Makes life easy.

Battery Tender, 2010-03-07;   By: RI(Rhode Island)
Product worked just as expected! Fast shipping, no problems. BEST price on the net! Everything needed in one package!

Just Bought My Second One, 2010-03-06;   By: Sanford Lavine(Alameda, CA USA)
I bought my first Battery Tender for a BMW M3 that I drive infrequently because of travel. The car uses a lot of power even when turned off and idle. After having to replace a dead battery my dealer suggested that I purchase a charger to keep my battery in good shape. I believe BMW sells this unit under their logo, but I bought it from Amazon for much less $$$.

Problem solved! Even after a one month long business trip my car started immediately. Seeing that green light on the Battery Tender gives me peace of mind that my car will start when I need it and my battery will stay in good shape.


When my wife's Honda S2000 would not start after sitting in the garage for a few months, I thought I would try my Battery Tender before calling AAA. After an overnight charge the car started right up. After an additional 24 hours the green light was constant telling me the battery charger was in maintenance mode. My wife asked me to buy one for her.

One Note: find out if your car can charge via the cigarette lighter. This seems to be the most convenient method. BMW 3 series prior to 2007 can charge this way but newer models cannot. The Honda 2004 S2000 cannot charge via the auxilliary socket between the seats, so I installed the terminal set directly to the battery.

This device works, is solidly built, and is a good investment.

Does the job!, 2010-03-04;   By: NHRef(New Hampshire)
Easy to use, easy to set up. The little green light indicates it's happy, too.
There's no way to know, of course, whether it made a difference since the alternative was to disconnect my '96 BMW M3's battery.
Don't bother with the cover. As noted elsewhere, the package it comes in is suitable for storage.

Must have if you own a classic car, 2010-03-04;   By: M. Maurice
All I can say is that it works great and I love the adapter that allows you to charge your battery without opening the hood each time. I use this on my 67 Caddy which I don't get to drive at all 6 months out of the year.

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