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  • Deltran Battery Tender (021-0128) 1.25 Amp Battery Charger
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Deltran Battery Tender (021-0128) 1.25 Amp Battery Charger

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List Price: $73.95
Price: $43.19 & FREE Shipping. Details
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  • Battery Tender Plus 12V - 1.25 Amp, Automatically switches from full charge to float charging mode
  • The Battery Tender Plus is a 1.25-amp battery charger designed to fully charge a battery and maintain it at proper storage voltage without the damaging effects caused by trickle chargers
  • Included is a quick connect harness for hard to reach areas
  • Temperature compensated to ensure optimum charge voltage according to ambient temperature
  • Battery Tender at 1.25-amp will charge as fast or faster than any 3-amp charger available, Reverse Polarity Protection to ensure user safety Red and Green Lights Alternately Flash in this condition
  • This item is not California or Oregon energy compliant.
  • To purchase charger if you live in California or Oregon please see attery Tender 022-0185G Charger/Maintainer
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Frequently Bought Together

Deltran Battery Tender (021-0128) 1.25 Amp Battery Charger + Battery Tender 081-0148-25 25' Quick Disconnect Extension Cable + Battery Tender 021-0123 Battery Tender Junior 12V Battery Charger
Price for all three: $80.01

Buy the selected items together


Product Information

Technical Details
BrandBattery Tender
Model021-0128
Item Weight2.3 pounds
Product Dimensions11 x 4 x 11 inches
Item model number021-0128
Manufacturer Part Number021-0128
OEM Part Number 021-0128
ABPA Partslink Number 13
Amperage1.25 A
Voltage12 volts
  
Additional Information
ASINB00068XCQU
Best Sellers Rank #29 in Automotive (See top 100)
Shipping Weight2.8 pounds (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S.
Date First AvailableOctober 2, 2003
  
Warranty & Support
Warranty, Parts: Parts
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Product Description

Product Description

Battery Tender Plus 12V - 1.25A. The Battery Tender Plus is a 1.25-amp battery charger designed to fully charge a battery and maintain it at proper storage voltage without the damaging effects caused by trickle chargers. Included is a quick connect harness for hard to reach areas. Temperature compensated to ensure optimum charge voltage according to ambient temperature. Automatically switches from full charge to float charging mode. Battery Tender at 1.25-amp will charge as fast or faster than any 3-amp charger available. Reverse Polarity Protection to ensure user safety. Red & Green Lights Alternately Flash in this condition. Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode). 10 year warranty.

Amazon.com

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.

The Deltran Battery Tender Plus 12-volt/1.25-amp Battery Charger with alligator clips, loop connectors and cable
4-step charging with automatic float mode.
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The 4-step charging cycle detailed for the Deltran Battery Tender Plus 12-volt/1.25-amp Battery Charger
The 4-step charge cycle detailed.
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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.

Customer Reviews

Keeping the battery charged does seem to extend the battery's life.
Robert Juull
I can go a week or two without driving the car in cold weather months, and this keeps the battery at 100% full charge until I need to drive the car.
circawdm
Great for keeping the motorcycle battery always charged and ready to go.
James Arrowood

Most Helpful Customer Reviews

469 of 476 people found the following review helpful By F. Dumanoir on June 22, 2007
Verified Purchase
Every time I want to fire up my old 71 Datsun (that's Nissan for those of you younger than 30) 240 Z there's a good chance that the battery has drained down and that I can't start it! Looking around at car forums I read about this nifty little gadget....It's like a battery trickle charger....sort of. Whereas it's not recommended to keep a trickle charger hooked up all the time, this one has circuitry to limit the current and sense when the battery needs charging. It only charges at 1.25 amps which is easier on the battery.

I've had it on for a month now and it's great. The first couple of days, the red light was on indicating charging. Since then it's been on green and the car starts right up. I live in Houston where the heat and humidity can be just as brutal on batteries as the cold.

I highly recommend this "tender" for those that have cars that stay unused for long periods.

As other reviews have mentioned it comes with a set of adapters that allow you to permanently attach pigtails to the battery posts and then you can quickly connect the tender without having to use the alligator clips (also included).

For the price and free shipping you can't go wrong!

UPDATE after two years of use.
I can now reconfirm that these battery tenders work great - I've had them hooked up continuously on two cars that stay in the garage a lot and I've NEVER had them not start right up. A quick glance at the LED display lets me know that the batteries are either charging or fully charged. It's a real pleasure to be able to go right up and enjoy your wheels without having to worry about whether the battery is dead. I can't say for sure, but I suspect that it lengthens the life of the battery as well.
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169 of 172 people found the following review helpful By Hal on March 6, 2008
Verified Purchase
This little gizmo is dynamite.

I have a 4 year old Accord that, due to circumstance, only has about 4400 miles. Rarely driven...and what driving is done is mostly at night.

Sat for a week once in very cold weather...dead battery.

Ordered this. Hooked it up. 100% charge and the battery is very powerful once again.( had thought I would probably need a new one).

It's very small size makes it extremely easy to use and store. And it will not overcharge, so you do not have to babysit the process.

It's LEDs glow red when charging. Green and red blink once 80% has been achieved. Solid green at 100%.

It did, in very cold weather, take a long time to establish a full charge on my almost completely discharged battery. The battery would have been usable in a few hours, but 100% took close to 18.

Highly recommended.
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94 of 99 people found the following review helpful By Glenn M. Soffen on March 4, 2007
I have an older version of this charger that I bought in the mid 90's. I used it to maintain my garaged Mustang's battery over the winter months for many years. I made a cigarette lighter adapter so all I needed to do was to plug it in instead of using the alligator clips. I have to say this thing is dead reliable! It always kept my battery in prime condition. I love it and recommend it highly.
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96 of 103 people found the following review helpful By BK on February 24, 2009
Verified Purchase
I bought one, for my own use and spent much time reading Deltran's website, and the finally the info that came with the Deltran unit.

Over all, Works well, made well (vented metal case). I've been testing it on a 55ah AGM.

I have a lot of background in battery chargers. Based on my review of the unit I bought, I wanted to maybe offer some general practical help for those that can't find all the info they need for guidance before they but such a product.

The price at Amazon makes it worth it, but not list at the OEM's site. The OEM list price is pricey for the Battery Tender Plus, the Battery Tender Jr is about 1/2 (based on the OEM price), and can take care of much of the same duties.

While I've read all I could from their site, all their advertising pre-sale doesn't warn that it may not charge a large cell that has been properly discharged. Once I bought my Battery Tender Plus, I found liteature comes with the charger that warns you of this..

I figured as much and bought it as a compliment to my smart bulk chargers that aren't good maintainers. The reason.......
If the power is interrupted on any of my bulk chargers, they don't come back to the correct profile, just the profile for 2amp charge for a wet cell general. Not the AGM profile.

The Deltran being a dedicated maintainer doesn't suffer from this problem.
If the power was to be cycled, it would just go through it's profile again. And since it's such low current, no harm.

These Tenders are Great for when the bulk charger is taken care else where on the larger RV, boat, or secondary car battery.
Read more ›
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69 of 74 people found the following review helpful By Crazy Dane on December 22, 2011
I own several vehicles and motorcycles and I had one of the pre china battery tenders and it lasted for several years. it did so well I bought 3 more of the battery tender pluses at one time at Christmas 2010.

one worked for about 9 months and then would not go into the float mode. It killed the battery from overcharging. hooked up the next on a different battery and it worked about 2 weeks before doing the same thing(not going into float mode). the 3rd one lasted less than a week........... each has a 10 year warranty so I phoned deltran and spoke to their "tech". he cannot understand my problem........ tried on different batteries. plugged into outlet first blah ,blah ,blah. I paid over $100.00 for 3 of these Chinese junk chargers.
I can send them back and they will check at my cost if nothing is found wrong I would be charged a service fee and return shipping. poor customer service ,bad quality. for what these cost they should last.
Do yourself a favor and do NOT buy these battery tender chargers........

Update: 1-15-2014 buy an xtreme charger......I have 3 of the red xtreme charger, see my review ........
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