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20Amp Battery Charger,Lithium,Lifepo4,Lead-Acid AGMHONGTUODA

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20-Amp Smart Battery Charger,Lithium,LiFePO4,Lead-Acid(AGM/Gel/SLA..) Car Battery Charger,Trickle Charger, Maintainer/deep Cycle Charger,12V/20A and 24V/10A,for Boat,Motorcycle,Lawn Mower,Golf cart..

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2,201 ratings

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Model: 20Amp

Brand	HTRC
Color	Black, Red
Product Dimensions	3.54"D x 6.14"W x 1.97"H
Item Weight	1.15 Pounds
Output Voltage	24 Volts

About this item

🚙 [Widely used] Intelligent automatic recognition of 12/24V battery, quick charging, 12V 20Amp, 24V 10Amp ultra-high power, deep cycle battery charging, does not damage the battery. Lithium, LifePO4, Lead acid (AGM/GEL/EFB, MF, Flooded battery, VRLA, SLA, wet battery..) Suitable for cars, trucks, motorcycles, SUVs, golf carts, agricultural vehicles, motorboats and so on. Maximum voltage: Lithium :12.4V / 24.8V. Lead acid :14.7V / 29.4V. LifePO4:14.6V / 29.2V. Please select the correct type.
🚗 [Protection and Maintenance] 7 level fast intelligent charger, temperature compensation, cooling system, over current, over voltage, short circuit and reverse connection protection, no spark, refractory material, 13 ft cable, multiple protection, safe and reliable. Input voltage :100-240V 50/60Hz, output voltage/current :12 V20A, 24 V10A. Minimum starting voltage :1V. Automatically and intelligently adjust charging current to prolong battery life. It can'tactivate a depleted battery
🚚 [Automatic charging] Automatic detection and identification of 12V and 24V batteries without manual selection. The CPU monitors the charging process intelligently. When fully charged, it automatically enters trickle charging, detects sulfate layer and acid layer, and adopts the latest pulse repair function to restore lost battery performance and extend battery life. You can select charging current and battery type. When the battery is low, the maximum charging current can reach 20 amps
🚌 [Safe Charging] Intelligent charger, large LCD display of charging and battery status; Charge voltage and current, internal temperature, charge percentage, summer, winter mode, etc. The operation procedure is simple, just plug in the power, select the battery type and charging current, and charge the battery intelligently. Battery charger, battery maintenance, trickle charger, battery desulfurization in one battery solution. Essential tools for your home. Let you charge more secure.
👏 [strong quality and service] we are a professional charger brand. We have quality products and after-sales service. We offer permanent after - sale service for this product. Thank you for your support, if you have any questions, please feel free to contact us! 📦📦【What You Get】 Smart charger, 3M power cord, cable clip, manual, 2 junction boxes

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Product description

20 amp smart battery charger

Problem 1: Can't reach the maximum charging current? To protect the battery, the system automatically identifies the battery voltage and selects the most appropriate current to charge the battery. When the battery voltage is low (for example, the 12V battery voltage is less than 11V), the system automatically charges the battery at the maximum current. (3 gears can adjust charging current, large current, fast charging)

Problem 2: The LifePO4 battery is not fully charged? When the battery is fully charged, it has a callback function, reducing the charge by about 1V, which is normal. Added a small current after full charge uninterrupted charging. 3: It is normal that the fan has wind.

P20 parameters: ac input :100v / 240v~ 50/60 hz

Output voltage :12V / 24V. Lithium /LiFePO4/ lead acid (AGM,GEL,EFB, MF, Flooded, VRLA, SLA and wet battery..)

Output current :12V20A & 24V10A

Support ah: 2AH-300AH, can have more capacity, the larger the capacity needs longer charging time.

Minimum starting voltage > 1.0 V

Power and load :MAX; 280 W

Size :158 x90x50mm(6.22 * 3.54 * 1.97 inches)

Net weight: 520 g

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Product information

Product Dimensions	1.39 x 2.42 x 0.78 inches
Item Weight	1.15 pounds
ASIN	B0B3CV4S2Y
Item model number	20Amp
Customer Reviews	2,201 ratings 4.4 out of 5 stars
Best Sellers Rank	#9,399 in Automotive (See Top 100 in Automotive) #77 in Battery Chargers
Date First Available	June 7, 2022
Manufacturer	ZHIHIUI

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Customer reviews

2,201 global ratings

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Customers say

Customers find the battery charger works flawlessly and appreciate its compact size, with one noting it's extremely small for a 20Amp charger. They praise its performance with various battery types, including LiFePO4, LTO, and AGM lead acid batteries, and its ability to fully charge in a reasonable amount of time. Customers find it easy to use and consider it good value for money, with one mentioning it's a low-cost high-quality solution for solar power supply. Battery life experiences are mixed, with some units shutting off automatically when fully charged while others stopped working after 30 days.

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Works well Battery quality Charge rate Ease of use Value for money Battery charge Size Battery life

375 customers mention "Works well"332 positive43 negative

Customers report that the charger works flawlessly and has no issues.

"Works great. Many other reviews mention it doesn’t actually charge at 20 amps, that is incorrect, they are unaware of the charging profile...." Read more

"The product is very easy to use and works great I've repaired 3 battery's so far and will be doing more, It brought life back to a car battery, a go..." Read more

"I am pleased with this purchase as it works well and is very easy to use. Charged my car battery quickly and I love how you can monitor the progress." Read more

"Why did you pick this product vs others?: Works well and fast. Thank you...." Read more

318 customers mention "Battery quality"291 positive27 negative

Customers are satisfied with the battery charger's performance, describing it as a nice and great quality device, with one customer noting it works well for a 200ah system.

"Great charger and price. it works fine for my LiFepo batteries. It does not seem to work with the SLA battery, maybe I'm not doing something right." Read more

"Great product! Really like the size and power produced plus many types of batteries that can be charged." Read more

"...Excellent product excellent shipping and great customer service. We can’t go wrong with this deal here!" Read more

"...This is a great charger in my experiences and I would highly recommend it to anyone. P.S. I also really like that it only weighs a pound or two...." Read more

289 customers mention "Charge rate"220 positive69 negative

Customers are satisfied with the battery charger's performance, noting that it fully charges batteries in a reasonable amount of time.

"...Just clip to the batteries and select battery type. This thing is fast, I have connected to 2 100ah lithium batteries for boat trolling motor...." Read more

"awesome charger, works great, charges fast... we used this to charge up our boat battery" Read more

"Work very well, charges quickly and efficiently. Works well for my 200AH LiFePO4 battery and charges it up quickly. Would recommend" Read more

"Unit will turn on, will not charge tried it on battery that had that read 11.8 volts, tried it on a lithium that was reading 12.6 had to use my volt..." Read more

178 customers mention "Ease of use"178 positive0 negative

Customers find the battery charger easy to use and set up, with one customer noting it's impossible to use incorrectly.

"Very well constructed and easy to use. Four options for use and one must be selected for each use, but they are clearly labeled and easy to see...." Read more

"Easy to use when it was hooked up plug-in it shows the load it means to be Young charge my battery, which was completely dead within four hours and..." Read more

"...I very happy with my purshase. Very easy to use, can charge different kind of batteries, 20 Amp...." Read more

"This little charger does a really nice job It is simple to use and has a functional useful read out Lithium, lead acid Works great" Read more

137 customers mention "Value for money"129 positive8 negative

Customers find the battery charger offers great value for money, being considerably less expensive and saving them a significant amount.

"Great value. Did a great job trying to save some of my deep discharge lead acid batteries...." Read more

"...cable long clip wires ,forget the others this is top shelf for a great price my neighbors were shocked to see it so small and more shocked to see..." Read more

"...It’s compact, fast and super easy to use. It is a great value too! I would highly recommend it" Read more

"...worked for awhile and for the size and versatility, it's probably a good value...." Read more

110 customers mention "Battery charge"102 positive8 negative

Customers report that the charger works well with various battery types, including lithium, LiFePO4, AGM, and FLA batteries.

"...The current can be set up to 35A that what I want. Work well for my LIFEPO4 200ah battery in a solar system for 3mos and 5 days...." Read more

"Works awesome on LiFEPO4 batteries. Compact, Portable, Powerful. Great Buy all around." Read more

"...I think this will last for years to come and charge all the batteries I now own...." Read more

"...but works well and does exactly what it is supposed to do - charge batteries." Read more

85 customers mention "Size"82 positive3 negative

Customers appreciate the charger's compact size, with one mentioning it's big enough to grab larger terminals.

"...Another reason why buy this charger is because I like how compact is it while the output of the battery is a XT60 connector, I love it...." Read more

"...Love it, especially with various settings for current charging levels, small, Light weight and easy to use. Highly recommended..." Read more

"Small - light weight - charges 3 different types of batteries. Great charger - Bought it to charge my lithium boat battery- did an amazing job" Read more

"Works awesome on LiFEPO4 batteries. Compact, Portable, Powerful. Great Buy all around." Read more

142 customers mention "Battery life"54 positive88 negative

Customers have mixed experiences with the charger's battery life, with some reporting that it automatically shuts off when fully charged, while others mention that it stopped working after 30 days of use.

"...bought this in August 2024 and used maybe 5 or 6 times and it has stopped working...." Read more

"Quality battery charger, easy to use, with indicator lights that provide battery charge status while charging & when finished...." Read more

"Stopped working after 6 months, and support ran out after 3 months. So...it works for the amount I paid, I guess...." Read more

"...Unfortunately, by the 2nd day it was no longer working...." Read more

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Honest Reviewer
Versatile and Reliable Charger
Reviewed in the United States on October 15, 2025
Model: 20AmpVerified Purchase

This smart charger works great on a variety of batteries — from lithium and LiFePO4 to standard lead-acid and AGM types. It charges quickly and safely, and I really like the clear display that shows voltage and charging progress. The build feels solid, and it’s easy to use even if you’re not super tech-savvy.

A great all-around charger that’s perfect for cars, RVs, or battery backups. Highly recommend!

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John
Versatile - Multi-battery type charger, recovery mode - LiFePO4, Deep Cycle, Starting, and AGM
Reviewed in the United States on February 1, 2023
Model: 20AmpVerified Purchase
20-Amp Smart Battery Charger,Lithium,LiFePO4,Lead-Acid(AGM/Gel/SLA..) Car Battery Charger,Trickle Charger, Maintainer/deep Cycle Charger,12V/20A and 24V/10A

I bought two of these from Amazon to charge up my LiFePO4 batteries for my off grid cabin setup at 9000’ in the Colorado Rockies. They work amazing – charging those to somewhere around 14.4-14.8 volts automatically. Not only did they charge my LiFePO4 batteries, they also revived my deep cycle L-16 batteries that the LiFEPO4 batteries replaced. The L-16 were the standard for solar a few years ago, and my L-16’s are about 6 years old on their last legs, needing constant monitoring, gassing off of acid, and needing to be refilled with ever scarce (during the pandemic) distilled water. The charger revived 3 of what I thought were dead L-16’s (and topped off the other 5). I’m now going to move those down to my garage to use in another solar application that’s not so critical (cabin itself is critical for furnace heating on propane when we’re not there, therefore the swap out to LiFePO4’s from L-16’s). The charger itself: display is very bright, buttons are well made, it remembers which battery type you last charged although very easy to set that, you can select the amps for charging which is great for low amp charging of ATV or Snowmobile AGM smaller batteries. Last weekend I had to move my LiFePO4 batteries inside due to severe freezing conditions and used the two chargers to top them off and make their voltage reasonably close to the other LiFePO4 batteries in the system before placing them back on the solar/gen-charger system. Worked perfectly. Also, since my main system is 24v, I can hook the charger up to the main battery bank on the main pos/neg to charge the whole system if needed. The chargers also have that recovery mode for Deep Cycle Lead Acid batteries, and that also works for normal car/truck starting batteries as well. Recovery mode on mine took about a day for it to cycle the lead acid cells – you can see/hear the acid bubbling when it does it and need to keep eye on acid/water level every so often as it recharges them, like I said I though they were deader than a door nail and they are now revived. I’ve looked at other multi-battery-type chargers, and these chargers fit the bill for my dozens of batteries and currently 4 different battery types – LiFePO4, deep cycle, starting, and AGMs – the mode button allows you to select which battery type for the proper charging voltage and cycle. I’ll probably buy a few more for use at my main house in the city.

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41 people found this helpful

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Rsmit8
20Amp Multi Use Smart Battery Charger
Reviewed in the United States on May 22, 2025
Model: 20AmpVerified Purchase
The Smart Battery Charger works on Lithium, LiFePO4, and Lead-Acid batteries. Used for charging, Trickle, or Maintainer, works on any battery. It worked great on my dead motorcycle, ATV, and mower batteries; they all charged perfectly. The charger is compact, has a digital screen, is easy to operate, and has sturdy alligator clips for connecting to the battery. See the manual for proper settings of charging speed and voltage mode. Great price and item.

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Amazon Customer
Great charger.
Reviewed in the United States on September 22, 2025
Model: 20AmpVerified Purchase
Great product. Easy to use. Much better than older charger, because you can charge any type battery. Will turn off when fully charged .

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Scott Meister
It Works, But...
Reviewed in the United States on June 30, 2024
Model: 20AmpVerified Purchase
There's several flaws in how it's designed, software (or firmware) wise. First, the voltage of the battery shown on the display is incorrect. I have a 12 volt LiFePO4 & this unit shuts off when the voltage reads 14.7 & shows FUL. That number is incorrect. With a multimeter, the ACTUAL voltage is 14.2 Same wrong voltage when I start to charge it. That number is (for example) 13.1 with a multimeter. The charging unit shows 13.7 at startup, so it reads higher than in real life, so keep that in mind. You're not getting as much as what's displayed.

Secondly, this unit does show how many amp hours it's putting into the battery. That's great but.....you have to be there right before the unit shuts off or you'll never see how MUCH it put into the battery. In other words, you'll only see how much voltage & amp hours it's putting INTO the battery & not how much it HAS put into the battery....total voltage & amp hours at end of cycle. It'll only show "FUL" at the end of the cycle no matter what you do. Big disappointment there!

Other than the two flaws above, this little unit DOES charge the LiFePO4 (with BMS) I have just fine. Doesn't take long when I use the 10 or 20 amp option. I'll probably never use the 5 amp option. That would take FOREVER to top off this battery!

And yes...as other have said, the fan is very loud when you use the 10 or 20 amp option. But...it keeps the inside of the charger cool. Ya don't want a fire, do ya??

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4 people found this helpful

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Lane Morehead
Reliable, Versatile, and Smart – A Must-Have Charger!
Reviewed in the United States on April 23, 2025
Model: 20AmpVerified Purchase
I’m thoroughly impressed with this 20-Amp Smart Battery Charger! It’s everything I needed and more. From charging and maintaining my car battery to keeping my boat and lawn mower batteries in top shape, this unit handles it all with ease. I really appreciate the versatility—it works perfectly with 12V and 24V systems and supports multiple battery types, including Lithium, LiFePO4, AGM, Gel, and SLA.

What really stands out is the smart charging capability. It automatically detects battery condition and adjusts the charging cycle accordingly, so I don’t have to worry about overcharging or damage. The display is clear and easy to read, showing voltage, current, and charging progress. Plus, the trickle charge and maintainer features are perfect for keeping my deep-cycle batteries ready during the off-season.

It’s compact, rugged, and simple to use—even for someone who’s not super technical. I highly recommend this charger for anyone looking for a high-performance, dependable battery charger and maintainer. Worth every penny!

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One person found this helpful

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Top reviews from other countries

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Terence
The small print.
Reviewed in Australia on July 6, 2023
Model: 25AmpVerified Purchase

I did not like that the ac mains plug was American therefore having to purchase a adaptor and only in the instruction booklet it states that you cannot charge lithium batterys without a management system, both of which incur an additional cost to use this charger as implied in the add. I probably would not have purchased the charger if i had known this beforehand. I will now think twice before i purchase anything else.
Regards Terry

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Tony Mah
It works automatically when plug in and shut down when the battery was charged.
Reviewed in Canada on January 11, 2023
Model: 25AmpVerified Purchase
This unit goes into an automatic program to recharge the 12V battery and works even near freezing temperature. The cooling fan is audible and runs even at ~ear freezing temperature, a little bit strange. It took about 12 hours to recondition the battery and recharge it to full power.

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David Marroquin
Funciona con baterias de Litio
Reviewed in Mexico on December 4, 2024
Model: 20AmpVerified Purchase
Resultó muy util. Lo utilizamos para rescatar unas baterias de litio que estaban muy descargadas. Volvería a comprar.

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LarDo
The cables on both ends come out of the device easily
Reviewed in Canada on October 12, 2024
Model: 35AmpVerified Purchase
Both cables come out of their plug-ins easily. Do not buy this device if you want to have a secure cable. As soon as you move it, it unplugged from the device. Poor design, and if you look at any of the competitors, they’re all permanently attached to their boxes. This is a poor design, and I returned mine do not buy it.

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Shawn dufault
Absolutely great buy
Reviewed in Canada on August 5, 2023
Model: 25AmpVerified Purchase
Done many of batteries that wouldn't hold charge this unit brought back to life

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