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Battery Tender Plus - 12v 1.25 Amp 4 Stage Smart Charger (BT-021-0128)

BT-021-0128
Was: $53.00
Sale Price: $45.95
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Product InformationStore Part Number: BT-021-0128

Overview

Keep your batteries fully charged without the adverse effects possible with traditional trickle chargers. The Battery Tender Plus smart charger makes optimal battery storage a reality with its 12V, 1.25 amp design. In addition, leave the charger wiring attached to the battery while operating the vehicle with its E-Z quick disconnect harness.

Each Battery Tender ships with one each quick disconnect ring set and alligator clips.

Features

  • Temperature compensated to ensure optimum charge voltage according to ambient temperature
  • Automatically switches from full charge to float charging mode
  • Ships with quick-disconnect ring set and alligator clips
  • Reverse polarity protection to ensure user safety
  • Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, and Float Mode)
  • Built-in mode indicators
  • Spark-free hook up
  • Perfect for Wet Cell, AGM and VRLA Batteries
  • Demand sensing
  • Reverse polarity protection
  • Short circuit protection
  • Thermal protection
  • Temperature compensation
  • 10-year manufacturer’s limited warranty

Comments

* Flat Rate shipping is for the lower 48 states only.


Tech Specs

  • Dimensions (LxWxH): 4.875 x 3.25 x 2.875 in
  • Weight: 2.75 lb
  • Shipping Weight: 3.0 lb
  • DC Output Amps: 1.25
  • Absorption Voltage: 14.6 V
  • AC Input Volts: 115 V
  • AC Input Volts Freq.: 60 Hz
  • Max Inrush Current, Single Cycle: 0.36 A
  • Float Voltage: 13.3 V
  • Manufacturer: Deltran
  • Power Factor: 0.8
  • Maximum Power (+/- 3%) @ 25° C: 18 W
  • Charge Reset: Battery Voltage Threshold: 12.5 V
  • Working Temperature: -20° to 60° C
  • Enclosure: Powder Coated Aluminum Chassis
  • Output Banks: 1
  • Temperature Compensation: Yes
  • Regulatory Approval: UL/CSA/CE/
  • Manufacturer Part #: BT-021-0128
  • Made In: Asia

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Reviews and Ratings

4.81 Average
5 Stars 17
4 Stars 4
3 Stars 0
2 Stars 0
1 Stars 0
Rated 4.81/5 Stars from 21 customer reviews.

Do you own the BT-021-0128? Please, tell us what you think about it. It helps us provide you with better products. Please note that it may take up to 72 hours for your review to appear.


Good for Storage Purpose
Pros: The charger is pretty simple, I like that you can plug it in, connect it, and walk away. I've been told it's safe to leave even for a year at a time.
Cons: The lights are a tad confusing to interpret. There is a sticker on the back of the charger that explains it, though.
Other Thoughts: My father purchased it for his Cadillac, which isn't driven very often. The battery is pretty old, but the Tender keeps it charged enough to start it when we need to (instead of jumping the car every time).
Is this review helpful?
Written by James Art Ville on Sep 14, 2011. Ownership: Don't Own. Knowledge Level: I know what an outlet is — (120 of 205 customers found this review helpful
12 Volt Battery Tender Plus
Pros: It is extremely simple to use. The connectors & the tender are both very solidly constructed. It does not take up much room at all. It provides very useful length cables. The operational lights are absolutely simple to understand. If you can read, you can use it right out of the package, (but you should read it first.) The built-in safety features are really well thought out!
Cons: Free shipping would be nice, but not really critical at all.
Other Thoughts: I have now bought a maintenance free battery from BatteryStuff.com with a whopping amount of cold cranking amps, (380) that starts my old Shovelhead with amazing ease, considering it runs on straight 50w or 60w depending on what time of the season it is & I have bought a great compact battery tender that I am really impressed with. Dealing with your company personnel has been a pleasure & I recommend BatteryStuff.com to all of my friends with power sports equipment.
Is this review helpful?
Written by Mr. Shovelhead on Dec 05, 2011. Ownership: Use regularly. Knowledge Level: AC/DC is more than a band — (97 of 177 customers found this review helpful
Battery Tender Plus 12v 1.25 Amp 4 stage Smart Charger
Pros: Very extensive educational opportunity to understand what I needed prior to purchase. Easy ordering process prompt confirmation of order shipping cost reasonable no tax a real plus quick delivery product performed as expected
Cons: directions not a detailed as I would have liked More visuals of components would have been appreciated
Other Thoughts: Online videos of how to hook up would be appreciated. Would like to see more videos included in you "knowledge base" would really be helpful as I want to use the tender to charge RV battery from an inverter/generator and possibly purchase an RV solar kit. As I am a visual learner videos would go a long way in my understanding of using equipment I intend to purchase.
Is this review helpful?
Written by Bev on Jul 08, 2014. Ownership: Just Bought. Knowledge Level: I know what an outlet is — (87 of 167 customers found this review helpful
More than just a Battery Tender
Pros: A compact light weight battery tender that has output cord options and a insulated terminal cover to protect it from shorting. I can have it plugged into an outlet in one spot in my garage and have leads long enough to run down into the battery compartment of my 22' boat and short enough to clamp onto lawn tractor battery with my pickup parked between them.
Cons: Maybe could use some heavy duty suction cup base rests to keep it from sliding off smoother work bench tops, boat decks, ect.
Other Thoughts: A must for boat, motor cycle, lawn tractor and owners of part time used cars, trucks and other 12 volt "man toys".
Is this review helpful?
Written by Boss Bill on Aug 13, 2013. Ownership: Use regularly. Knowledge Level: AC/DC is more than a band — (84 of 164 customers found this review helpful
Magic Box
Pros: Small, economical, does it all. Easy to plug in to my 'cigarette lighter' It couldn't be any easier than this.
Cons: nothing
Other Thoughts: I bought a used Porsche Boxster and the salesman (and some of my friends) highly suggested getting a battery tender to keep my battery fresh and usable. I took their advice, and couldn't be happier. The first time I hooked it to the car...it took quite a while to charge the battery (so I knew the battery was low) Now it takes no time to top off the battery and keep me starting like a champ. I am very very happy with this product
Is this review helpful?
Written by BJ on Mar 28, 2013. Ownership: Use regularly. Knowledge Level: Electricity doesn't scare me.. usually — (88 of 167 customers found this review helpful
What a great product and experience
Pros: The Battery Tender plus is a great product for maintaining my modest little car collection. It's also great for my tractor as well as for my truck. Very versatile with the different types of charging connections included and available. Very competitive price. Even with the shipping it was still less than going to WalMart and paying for gas, tax etc., plus you can get all of your accessories at the same time, which I wasn't going to be able to do at my local stores where I live. The biggest pro is the great customer service at batterystuff.com. I had a minor packaging issue. Patrick took care of it and in less than 15 minutes a replacement clip was literally on it's way out of their door & on it's way here. Seriously,
Cons: All is well. No problems. If there were, you would have done whatever it took to fix it.
Other Thoughts: Thank you Patrick. You and the the shipping staff are AWESOME ! I was treated with respect, courteously and, most important of all, you honestly gave a crap about my little issue. You have earned my business for the rest of my days. I wish I had found and bought from your store sooner. Thank you, again.
Is this review helpful?
Written by Drew on Apr 09, 2014. Ownership: Just Bought. Knowledge Level: Electricity doesn't scare me.. usually — (87 of 166 customers found this review helpful
Battery Tender Plus 12v 1.25 Amp Charger
Pros: I bought two of these chargers to maintain batteries at both of my garages. The cord disconnect feature is great for allow quick hook up/disconnect to multiple vehicles. I bought extra fuse protected battery leads and a long lead to allow me to connect down in a covered boat battery compartment while covered. Now I don't have to remove batteries for charging and can rotate the charger between boat, tractor, truck, lawn mower and motorcycle with one simple connection.
Cons: Seems a bit pricey but has a excellent warranty and features plus a great reputation.
Other Thoughts: I purchased after brother's recommendation that since using this one on his boat battery he has not had to replace it since 2004. His neighbor uses the cheapo Harbor Freight charger and has to change his boat battery every year or so and finds it low or out of water often.
Is this review helpful?
Written by Kirk on Jan 19, 2013. Ownership: Use regularly. Knowledge Level: AC/DC is more than a band — (96 of 174 customers found this review helpful
12V Battery Tender Plus
Pros: Small, compact, simple and extremely easy to setup, use and understand. Doesn't get much simpler and does the job.
Cons: I'm old school ... need lots of flashing lights and stuff! Has one red light for charging and one green for storage. Geeezzze ... wheres the cool in that? :)
Other Thoughts: Using to keep the excellent Scorpion battery (also from BatteryStuff.com)for my Harley bagger charged while its going through its Winter makeover ... (read) parts covering the garage floor.
Is this review helpful?
Written by Wayne on Jan 20, 2012. Ownership: Just Bought. Knowledge Level: Electricity doesn't scare me.. usually — (95 of 173 customers found this review helpful
Pure Awesomeness
Pros: This battery tender is absolutely pure awesomeness. She works with my GTO (AGM Batt), 3/4 GMC 2500HD, my wife's Accord, and little red (my front loader/4wd tractor). She never fails and is always reliable regardless of the battery type she is on. I am close to giving her a name. Heck, I call it "her" already. Customer service at BatteryStuff is also always reliable. You guys and gals are great. I am 100% confident that it will work.
Cons: None
Other Thoughts: Go ahead and get at least one extra set of the permanent post attachments as well as the 25' extension. You'll be glad you invested in them. They add a great deal of versatility.
Is this review helpful?
Written by Drew on May 02, 2014. Ownership: I've thought about naming it.... Knowledge Level: AC/DC is more than a band — (87 of 165 customers found this review helpful
Great charger
Pros: Great charger..... works as expected thank you batterystuff..
Cons: None
Is this review helpful?
Written by Anonymous on Aug 17, 2012. Ownership: Use regularly. Knowledge Level: Electricity doesn't scare me.. usually — (87 of 165 customers found this review helpful
Great battery ... great price
Pros: Your product was exactly as described. Great price. Delivery very timely. Will use you again, especially after comparing others' prices.
Cons: Nothing to complain about
Is this review helpful?
Written by Rev Two-Wheeler on Oct 08, 2013. Ownership: Just Bought. Knowledge Level: I know what an outlet is — (82 of 160 customers found this review helpful
Good buy (so far)
Pros: I just bought this, so I don't want to go overboard and overrate it, but so far so good. The only reason why I purchased it is because my old Battery Tender, which was about fifteen years old, was stolen. It's a well-built product. The connectors on this one are better. It comes with a standard set of alligator-type clips and also a set which you can leave hooked up at all times. This makes it really convenient and this version has a cap. My old one didn't, which made me a little concerned when I rode through water or in the rain. It's really easy to use and a good price. Ordering was easy and it arrived quickly.
Cons: None so far.
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Written by Pat on Mar 24, 2012. Ownership: Just Bought. Knowledge Level: Genius is my way of life — (87 of 164 customers found this review helpful
Battery tender
Pros: I bought this as a gift for my boyfriend for his motorcycle and he is very happy with it. It works well and he has no complaints.
Cons: None
Is this review helpful?
Written by Barbie on Jan 21, 2013. Ownership: Just Bought. Knowledge Level: I know what an outlet is — (84 of 161 customers found this review helpful
battery tender plus
Pros: nice compact operates well
Cons: the fuse holder on the wiring you leave connected to the battery is to close too the ring terminal and won't fit in my battery compartment. I had to splice a longer wire on it to fit.
Is this review helpful?
Written by Anonymous on May 16, 2012. Ownership: Just Bought. Knowledge Level: AC/DC is more than a band — (84 of 161 customers found this review helpful
Mrs
Pros: Works great
Cons: None
Is this review helpful?
Written by Anonymous on Oct 24, 2013. Ownership: Use regularly. Knowledge Level: Electricity doesn't scare me.. usually — (81 of 158 customers found this review helpful
Battery Tender Plus & Battery Tender Jr.
Pros: Recently bought 3 Battery Tender Plus units for the batteries in the boat and 2 Battery Tender Jr. models for lawn tractor and ATV all are performing as advertised.
Cons: None at this time.
Other Thoughts: Nice to find a company that follows through with what it advertises about itself. Had good service and order was correct and arrived within time expected. Keep up the good work. By the way this is the first time I have felt that I could honestly tell others about a good experience in dealing with a company that does what it advertises. Thanks
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Written by Oldtimer on Sep 26, 2013. Ownership: Just Bought. Knowledge Level: AC/DC is more than a band — (86 of 162 customers found this review helpful
New battery tender purchase
Pros: I bought my original battery tenders (4) between 1995 -1999 and they are still going strong and doing their job. I had a dead battery and assumed the battery tender had crapped out too, but due to the bad battery was the reason the batery tender was letting me know the battery died. I read the instructions on the brand new tender and learned something new, temder just doung what it is supposed to do
Cons: No Cons
Other Thoughts: I like the additionl information provided with the updated tender
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Written by six-pak on Nov 04, 2014. Ownership: Use regularly. Knowledge Level: AC/DC is more than a band — (85 of 161 customers found this review helpful
Battery Tender Plus
Pros: Keeps the battery in my rarely driven Chevy S-10 charged and ready to go. Much better alternative than having to get a jump start every time I need the use of this vehicle.
Cons: The ring terminals provided are just a bit too small for use with my top of the line Interstate batteries side terminals. Without drilling them out to a larger opening, they are esentially worthless to me! I have opted to purchase the 12' extension cord and cigarette lighter adapter rather than having to go under the hood and fool with those damn little alligator clips!
Other Thoughts: Overall, after ending up spending nearly $100., including the extension cord, cigarette lighter adapter and large storage case,(to keep everything together and organized),I now have found a solution that works for me in resolving what was an ongoing issue with a rarely used vehicle. Understand that needs and solutions may differ, but generally speaking, this seems to be a well made and useful product. You can have all the jumper cables in the world, but "Murphy's Law" being what it is, there will never be anyone around to give you that jump when you need it. Keep your battery operating at an optimal level with a Battery Tender!
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Written by Anonymous on Nov 14, 2013. Ownership: Just Bought. Knowledge Level: Electricity doesn't scare me.. usually — (83 of 159 customers found this review helpful
Battery Tender Plus
Pros: Charger seems to be working great for the first month that I've had it.
Cons: None
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Written by Anonymous on Mar 11, 2013. Ownership: I've thought about naming it.... Knowledge Level: Electricity doesn't scare me.. usually — (83 of 159 customers found this review helpful
Battery Tender Plua
Pros: Great product
Cons: I wish the pigtail was 2 feet longer so I could snake it through the grille.
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Written by Anonymous on Dec 26, 2013. Ownership: I've thought about naming it.... Knowledge Level: Genius is my way of life — (82 of 158 customers found this review helpful
wonderful
Pros: AS long as you have the right product it works just great. I had one that was designed for a very small battery and I could not figure out why it did not keep the truck charged. I switched one from a sedan to the truck and it worked fine. Bought a second to use on the sedan.
Cons: None but make sure you have the right size
Other Thoughts: The customer service from the manufacturer is super. I was missing a set of clips and they sent me a set at N/C
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Written by laughlin on Mar 27, 2015. Ownership: Use regularly. Knowledge Level: Electricity doesn't scare me.. usually

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Warranty Sheet

Troubleshooting Guide

Product Information

Installation Manual

Product Instructions

Chargers Tutorial

Why does it read 13 volts?




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