|Model||Junior 12V, 0.75A Smart Battery Charger and Maintainer|
|Item Weight||1.8 pounds|
|Product Dimensions||8 x 4 x 9 inches|
|Item model number||021-0123|
|Is Discontinued By Manufacturer||No|
|Manufacturer Part Number||021-0123|
|OEM Part Number||cc2851011|
|Cover Included||Battery charger and maintainer, Alligator clips, Fused ring terminal harness|
|Vehicle Service Type||All of the above|
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Battery Tender Junior Charger and Maintainer: Automatic 12V Powersports Battery Charger and Maintainer for Motorcycle, ATVs, and More - Smart 12 Volt, 750mA Battery Float Chargers - 021-0123
|Price:||& FREE Shipping. Details & FREE Returns|
|You Save:||$12.00 (30%)|
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- STAY CHARGED: Provides a full charge to your machine’s battery before switching to float mode to maintain proper voltage levels for safe, long term storage without overcharging. Spark proof during lead connection, reverse polarity protected and includes a 12-foot output cord and 5-year warranty
- EASY TO USE: Low maintenance design to be quick and easy to use, our universal powersport vehicle charger and maintainer is compact and lightweight. Perfect for charging all 12-volt lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell) and safety timer-80 hours
- EXTENDED BATTERY LIFE: Compatible with lead-acid, flooded, and sealed maintenance free batteries (AGM and gel cell) to be ideal for use in long term storage. Complete 4-step charging program (Initialization, Bulk Charge, Float Mode) allows for optimization of battery power, without overcharging
- MONITOR POWER LEVELS: Solid state two-color LED light indicates the state of the charge and if the battery voltage drops too far under load, ISM adaptive charging will resume full charger output power. Automatic charge cycle functionality switches to float mode after fully charging the battery
- SAFE AND SECURE: Our battery charger and maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct. Solid state two color LED indicates stage of charger and if the battery voltage drops too far under load, full charger output power resumes
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|Sold By||Amazon.com||Amazon.com||FOVAL||MOTOPOWER INC||Delta Kits Inc|
|Item Dimensions||8.00 x 4.00 x 9.00 inches||11.00 x 4.00 x 11.00 inches||3.90 x 2.40 x 1.20 inches||4.10 x 2.00 x 1.50 inches||10.00 x 4.00 x 10.00 inches|
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Battery Tender Junior 12V Battery Charger is much more than a trickle charger. It has a brain, is lightweight, compact, fully automatic and very easy to use especially in small spaces. This battery charger will keep the battery fully charged so that it is ready to go always. It has a microprocessor controlled fully automatic charger and maintainer and is designed to extend the life of any lead acid battery commonly used in automobiles, motorcycles, ATVs, personal watercraft, RVs, boats, airplanes, golf carts, back-up generator systems, etc. Any vehicle or battery-operated piece of equipment not used on a daily or regular basis is a candidate for a Battery Tender charger. The advanced technology will bring the battery back to a full charge without overcharging and then float or maintain the battery for an indefinite period of time. The Battery Tender Junior comes equipped with alligator clips and ring terminals for easy hook up. An optional 25 feet extension cord (part number 081-0148-25) is sold separately.
From the manufacturer
Battery Tender Junior Benefits and Features
Our onboard computer assures correct level of power is sent to the battery at all times.
ISM Adaptive Charging
ISM (Infinite Sequential Monitoring) adapts to the battery’s needs hundreds of times per second.
Reversed Hook-Up Protection
Battery Tender checks for a correct connection before giving power.
Battery Tender checks for a correct connection before giving power.
Quick Disconnect Harness
Connect and disconnect Battery Tender Junior in seconds.
Connect and Forget It
Once connected, the Battery Tender manages your battery’s health on it’s own.
Ideal for Motorcycles, ATVs, Scooters, and Automobiles.
- Input Voltage: 120VAC / 60Hz.
- Output Voltage: 12 Volts DC @ .750 MA.
- Shipping Weight: 2 Lbs.
- Agency Approvals: UL/CSA.
- P/N# 021-0123.
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Edit: For those considering this product... It is not a battery charger. It is for maintaining fully charged batteries. There are some negative reviews from folks that did not realize what they were buying.
I unpacked the 2nd 021-0123 Battery Tender Junior, intended for my motorcycle, plugged it in and it lasted maybe 15 seconds and did the same "clicking" thing and died. The replacement process went smooth but I have not received the new ones yet.
But let's first get back to basics: what is a float charger, and why is it needed?
Lead-acid batteries, of the type used in cars and motorcycles, lose a part of their charge over time just sitting when they aren't even connected to something. When left in a bike that has a clock or radio memory circuit in it that constantly draws power even when the bike is off, that loss of charge is even faster.
Lead-acid batteries "like" to remain at full charge at all times. A battery that is kept at full charge will have a much longer service life than a battery that is left sitting with less than a full charge.
I used to go through a lot of batteries - my motorcycle batteries would last between one and two years before they needed replacement. With multiple motorcycles (not to mention other battery powered things like a generator, snow blower, etc.) this gets expensive!
I figured I would put a trickle (float) charger on my main GL1100 battery to help keep it fully charged. I bought a cheap trickle charger from Harbor Freight, for under $10. I hooked it up to the battery and left it sitting overnight. The next day, to my utter surprise, the battery was dead! The cheap trickle charger, with no intelligence in it and no way of turning off when the battery was charged, overcharged the battery, destroying it! I could charge it fully, but its plates were sulfated, and it would no longer produce enough current to start the bike. This was an expensive lesson - and taught me about the false economy of Harbor Freight float chargers!
So it was with a bit of trepidation that I tried the Battery Tender Jr. - I didn't really want to throw another $100 down the drain for another new battery. The difference with the Battery Tender products is that they are intelligent: they have computers inside that analyze the state of charge of the battery to which they are connected, and alter their output to adjust: Initialization, Bulk Charge Mode, Absorption Mode, Float Mode).
The result: I'm still using that battery five years later, and it still works like it is brand new. I was so impressed that I bought more: I now own five Battery Tender Jr.'s, and they are connected to all of my bikes and devices, 24/7. Every time I park my bike, I plug it in. I have not had a single battery go bad in the five years since I have started using Battery Tenders - and every battery still performs like it is brand new.
The Battery Tender Jr. comes with a 12 foot cord and a plug. This plug then attaches to one of two included connectors: a set of alligator clips, for temporary attachment to a battery, or a set of ring terminals, for permanent attachment. I use the ring terminals, then feed the other end of the connector up through the bike somewhere where it can be hidden. In my wife's PC800, the connector hides behind the right passenger footpeg. In my GL1500, it hides in the left passenger cubby. When I park the bike, I simply flip open the cubby, plug in the Battery Tender, and I know the battery is protected and maintained.
The Battery Tender is designed to be pretty much indestructible. You can hook it up backwards to the battery, and nothing will happen. You can start the bike with it connected, no problem, it simply turns itself off. It's spark proof, and has an indicator light that flashes and changes color to tell you the state of your battery, and what it is doing to manage it. It has a five year warranty, which I have not had to use.
The Battery Tender works great on standard flooded wet-cell lead-acid batteries, as well as AGM (absorption glass mat) batteries. If you have a gel-cell battery, there is a different version that has programming to work properly with them.
And you can now get accessories that plug into the Battery Tender vehicle-side connector when the Battery Tender is not connected. These provide USB charging outputs and 12 volt cigarette lighter-style power ports to allow you to plug your electronic devices into your vehicle. See more about these accessories here: Battery Tender USB Charger and 12 volt Socket
Overall, this is one of my favorite products, they work amazingly well, keep your batteries in top shape, and cost less than a quarter of the cost of a single new battery. I can't recommend them highly enough.
Top international reviews
I travel a lot for work, so my car is parked at home for 2-3 weeks every month. I drive a BMW, and the electronics draw the battery down while it's parked. It will start after 2 weeks but not after 3 if no one runs the engine. So I picked up a battery tender junior and I've been very happy with it. It's small enough to tuck in the trunk, and the detachable leads are a great feature - I leave them attached to my car's jumping posts under the hood, so it takes all of a few seconds to connect or disconnect.
It's kept my battery in great shape. In fact I've gained a few tenths of a volt both with and without the engine running, which is pretty fantastic considering my battery is 4 years old. I run a couple aftermarket amps, an obd2 wifi dongle, and a radar detector, which I know is taxing on my car's electrical device, so this guy gives me some peace of mind. And it's a steal for the price... it's a half to a third the price of a decent trickle charger, and it's better for my battery which is going to save me money over time. Very happy with this purchase.
In my opinion, the best feature of the Battery Tender trickle chargers is that most of them have split cables with capped connectors in the middle, and the way they hook up to the battery and ground is with ring terminals, so you can effectively connect the battery side and leave it hooked up permanently, and just connect the two halves of the cable when the vehicle is stored.
Remove your car's positive battery terminal, pull the tension bolt out of the clamp, add the BT Jr's positive cable's ring terminal to the clamp, put the bolt back through and reinstall. Connect the BT Jr's negative ring terminal to a good ground (an existing body ground in the engine bay, or in my case the trunk is ideal), plug the two halves of the cble to each other, and plug the brick into an outlet. Takes like 5 minutes, and when you are ready to take your vehicle out of storage, unplug the brick, unplug the two halves of the cable from each other, slide on the attached rubber caps, and you're ready to go. Being able to just leave it connected permanently is such a great feature for something like this meant specifically for summer vehicles or motorcycles. 100% recommended for ease of installation, good build quality, and very reasonable price.
The ATV battery was approx, 50% depleted - the battery tender brought it up to a full charge within 2-days and has maintained it there for the past week (Note: the battery is outside in below freezing weather). I have the battery tender in a weather protected compartment.
I used to use a more expensive CTEK unit for my Buick, but it was really a waste of it's more advanced features sitting on float for 99% of it's time.
So when vehicle get's stored for winter, I usually plug the CTEK to the battery first for an overnight charge to ensure a nice full charge. Then I switch over to the Battery Tender to keep it on float for the winter months.
So far, no complaints, works as expected.
I would have preferred that it wasn't a brick style adapter, and actually had a cord coming out of it with a normal plug (like the CTEK units do), but not taking off any stars for that, since it was not advertised as such.
Con el battery tender cuando se que no la voy a usar en una semana o más la dejo conectada, hasta el momento voy para 3 años con la actual batería y se siente como el primer día.
Imagino que lo mismo puede ser para pequeños tractores que solo se usan por temporada o incluso alguna batería automotriz que requiere mantenerse cargada.
2 sets of leads, alligator clips and ring terminals, both with inline fuses, allow for permanent or quick changing options for your battery hookup. I use the rings in vehicle for storage between uses in the summer and the alligator clips when I take the batteries in the house over the winter. Both work equally well.
I have a Toyota MR2 (small sports car, similar to a Miata) and the battery was temperamental when I first purchased the vehicle. Sometimes I would park it and have to bump start the vehicle when I returned, thanks to a manual transmission and light vehicle I could do it on my own, an auto would have needed a boost. I was nursing the battery until I absolutely needed to reolace it. Having hooked it up to a Battery Tender Junior while parked in the garage, the trickle charger seems to have rejuvenated the battery. Within a few months the battery stopped draining while I was away for a few hours and seven years later I'm still using the battery and can leave it for several days without plugging it in. The Junior is not listed as being able to desulfate batteries, but mine has gone from nearly useless to normal operation.
With the car and motorcycle batteries in the house over winter the Junior never overcharges or boils either battery. I finally had both of my old units fail, both Battery Tender Juniors with the old plain box plug, after six or seven years. These new ones have a stylized enclosure, what difference it makes I do not know. Nor am I aware of what updates Deltran has put into the units over six years, but the operation is exactly the same as the old ones.
A note for users. Unplug the tender before starting your vehicle. It doesn't have the output to act as any kind of effective booster anyway and having the circuit completed while cranking your starter will blow the fuse, though the unit itself did not seem to be effected.