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🔋 Keep your ride ready, effortlessly and smartly.
The Battery Tender 021-0123 Junior is a 12-volt smart battery charger designed for hassle-free maintenance charging. With automatic float mode, a compact form factor, and a simple plug-and-play setup, it ensures your vehicle battery stays healthy and fully charged. Made in the USA and highly rated by thousands, it’s the go-to charger for motorcycle and vehicle enthusiasts who demand reliability and ease.











| ASIN | B000CITK8S |
| Amperage | 0.75 Amps |
| Brand | Battery Tender |
| Brand Name | Battery Tender |
| Colour | Black |
| Country of Origin | USA |
| Customer Reviews | 4.8 out of 5 stars 47,909 Reviews |
| External Testing Certification | Não Aplicável |
| Global Trade Identification Number | 00734357000078 |
| Input Voltage | 12 Volts |
| Manufacturer | BATTERY TENDER |
| Manufacturer Part Number | 021-0123-CA |
| Model Number | 021-0123 |
| Number of Ports | 1 |
| Output Voltage | 12 Volts |
A**J
Just plug n play. Very smart charger.
I bought it for my HD Fat Bob. It is so easy to use that I need not remove battery from bike. I just have to connect to a pig tail connector of my bike with this charger and thats it. It charges and let us know when it is fully charged with light indicator. Now charging my bike is as easy as charging my mobile.
L**K
Not working
Waste
J**O
Excelente
Perfeito
D**E
Battery Tender Junior Trickle Charger and Charge Maintenance
We have a '98 Lexus ES300 with a 2.5year-old Toyota battery installed, and this winter the car has been parked outdoors and goes several days without starting (second car). However, on the day one of us needed it, the car failed to turn over as the battery had really run down due to loss of charge. AAA Service tech was called, he did a battery check, found it to be still useable, did a jump start, verified that alternator was putting out required charging voltage, and told us to run the car for at least a half-hour, when the battery should more or less be charged up...which we did, and it was. The service tech also suggested installing a trickle charger, which brings me to this review. After checking all the user reviews on Amazon for both the Battery Tender (BT) Junior and the BT Plus, we opted for the lesser-priced Jr., being aware that many users recommended the BT Plus for automobile battery use over the Jr.. The Jr. arrived about 3 days after our flat-battery incident, and following mfr. instructions, we connected ring adapter to battery, attached the 25ft extension cable, and plugged the unit into one of the interior garage 115V outlets. The indicator light went to solid RED, and stayed that way for between 36-42hrs, when it then went to blinking GREEN, and shortly thereafter to continuous GREEN. Car starter cranks immediately, all systems running, and it certainly looks - without an independent check of battery amperage - that the Jr. did its job, and placed the battery at full charge and switched to "floating' or maintenance mode. Interestingly enough, the user manual states that the "blinking GREEN" condition (at least 80% of full-charge) is seen only for the 1.25A version (BT Plus), but it also was noticed for the Jr.'s status light. After a week, we are totally satisfied with our purchase, as the device works as advertised, easy to install, and seems reliable to date. It should also be noted that all electrical connections are made either indoors or under a (closed and locked) hood, with the extension cable itself being the only part of the charging system exposed to the elements. Will monitor the BT Jr. throughout the winter to check on longer-term reliability issues.
J**S
Muy buen artículo
Muy bien
I**Y
Easy to use and fantastic
Easy to use and works fanastic
A**D
Scam product
What great product i bought depending on its reviews but it just last for 3 seconds and then it blow up … cheap quality
Trustpilot
5 days ago
1 week ago