This didn't come with a owner's manual. could somone send a link of the manual to upload, or send some screenshots, to know all of the features???

I've attached a video of the manual, which I have as a scanned PDF. Why Amazon doesn't let us post a PDF is beyond me! Anyway I converted the PDF to a video using Debut software. BTW... I use the charger all the time to keep my tractor, Gator, and vehicle batteries charged during winter months of inactivity. I really like its ease of use and functionality. Gets 5 stars from me...I have two of them, one at Ranch and one at home.

Can this charge marine batteries?

Yes, will charge deep cycle 12v batteries. Select MOTORCYCLE for low amp charge or indefinite maintainer. Or for faster charging, charge the battery in regular mode (STD/AGM,GEL/WET) and it will go through the cycle and charge to FULL. Then switch to MOTORCYCLE mode to maintain the battery for long periods. Once it finishes the motorcycle charge mode, it will indicate FULL and go into standby mode. If the battery voltage drops below FULL, the charger will restart and charge to FULL again and repeat the process, thus not overcharging the battery. I have tested this mode several times by turning on the headlights to force the battery voltage to drop while leaving the charger connected. Each time it has restarted and topped of the battery to FULL and gone back into standby. The enclosed instructions are crap. I found this information on a different branded but exact same model instruction. This Amazon website now shows these instructions.

I have a condo so I can’t run a power cord to my parking spot. Can I charge the unit then charge my battery. If not do u kno of a charger that does?

No, it will not "charge" your battery. It will give you enough power so that you can start you car. The battery should charge while you drive or let it run for a while. If the car will not start after you have driven it, it's time to buy a new battery.

Do battery charger operate well off a generator ?

I have never tried it with a generator, my utility supply is 115V and it works well. I think that it will work if the generator voltage is stable and at appropriate output voltage.

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Reviews

A**.

Good product must buy

Good product fast charging

21.11.2025

V**Y

Must buy product

Excellent product

7.12.2025

S**J

Compatible product

Good product

1.11.2025

J**A

Good for Battery charging & repairing of deep discharged battery

Very good performance. I have 150 AH Battery which was deep discharged due to one year idle. The voltage was 4.5V. But by this battery charger, I used Repair mode and charged such deep discharge battery to full voltage 12..9V.

28.10.2025

N**R

Work

Good quality, also perfect

28.11.2025

S**L

Achha pasandita item he

I have 4 lead acid 150ah 4 battery in my solar system that it have not given backup then I purchased YONHAN 12v/24v 10amp charger from AMAZON, I used it 12 hours in every battery in month of NOV then it restored my battery backup thank you Amazon customer service.

19.11.2025

P**T

Battery not correct charge

Not correctly work

7.01.2026

A**R

Worked fine for my car battery

Good

20.11.2025

A**R

A great charger at a great price.

5.10.2025

J**C

Needed a battery charger to help restore a car battery that was really low. Saw so many different options and pricing for models that I didn't know where to even start. Then I saw how many people bought this little charger and raved about it. For less than $40, why not give it a go? So happy I did. This charger is amazing. Plug and play and so simple to use. Took a few hours but got my battery back to 100% with the bonus repair function built right in. Have used it to repair and top up other batteries as well. Totally satisfied and already recommended it to a buddy to buy and he is loving it as well. Great purchase!

11.12.2025

S**9

I bought this because I have a battery on my generator that has been dead for about a year. I used the repair mode and after approximately 6 hours, the battery has a full charge and is holding the charge. It is compact and very easy to use

26.12.2025

A**K

Great value for money

1.01.2026

V**I

Produto muito bom, recomendo

6.08.2024

Brand	YONHAN
Manufacturer	YONHAN
Model	RJ-C121001A
Model Name	Car Battery Charger
Product Dimensions	6.1 x 15.75 x 9.4 cm; 589.67 g
Item model number	RJ-C121001A
Batteries Included	No
Batteries Required	No
Number of Ports	2
Includes Rechargeable Battery	No
Manufacturer	YONHAN
Item Weight	590 g

YONHAN Battery Charger 10-Amp 12V and 24V Fully-Automatic Smart Car Battery Charger, Battery Maintainer Trickle Charger, and Battery Desulfator with Temperature Compensation

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