Battery Charger 0-20A 12V and 24V Lithium, LiFePO4, Lead Acid (AGM/Gel/SLA), Smart Car Battery Charger and Maintainer, Trickle Charger with Pulse Repair for Cars, Boats, Marine, Motorcycles
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This item is eligible for return within 30 days of receipt
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Availability:
In Stock.
Arrives
Sep 29 – Oct 17
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Color: P20-Black
Features
- Smart Charging with One-Button Start & 20A Max Current20Amp Car Battery Charger offers one-button start functionality for ultimate convenience. With a maximum charging current of 20A, it delivers fast charging for a variety of battery types, ensuring your vehicle or equipment is ready in no time. Compact & portable design makes it easy to carry and store, perfect for home garages, boats, and traveling.
- 3-Level Adjustable Charging Currents for Optimal PerformanceChoose from three adjustable charging currents for 12V (5A, 10A, 20A) and 24V (3A, 5A, 10A). Select the best option based on your batterys needs and enjoy efficient, safe charging. Whether youre charging Lithium batteries, Lead Acid, or LiFePO4, this charger optimizes power delivery for a longer battery life.
- Wide Compatibility: Supports All Popular Battery TypesThis battery charger works with a wide range of batteries, including Lithium, LiFePO4, Lead Acid (AGM, Gel, SLA), and more. Perfect for a variety of vehicles and equipment like cars, motorcycles, boats, electric golf carts, tractors, lawn mowers, and forklifts. Versatile charging ensures youre always prepared for any situation.
- Built-In Temperature & Multiple Protection Features for SafetyThis smart battery charger comes with an integrated temperature sensor, working in -10C (14F) to 40C (104F) conditions. Equipped with overvoltage, overcurrent, short circuit, low voltage, and electrostatic protection, it ensures safe, worry-free charging every time.
Brand: Haisito
Color: P20-Black
Product Dimensions: 7.64"D x 2.68"W x 6.72"H
Item Weight: 1.23 Pounds
Output Voltage: 24 Volts (AC)
Product Dimensions: 7.64 x 2.68 x 6.72 inches
Item Weight: 1.23 pounds
Item model number: EF-20
Date First Available: June 9, 2021
Manufacturer: Haisito
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sep 29 – Oct 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: P20-Black
It is useful. I use it to charge 12v LiFePO4 battery. Leave it working overnight in my garage, and it fully charged and automatically stops. Good design!
Reviewed in the United States on May 31, 2025 by Peter Li
Color: P20-Black
Works perfectly for charging standard AGM and LiFePo4 batteries. Lots of good info displayed on battery condition, charge rate, and voltage. Five stars. Note that the fan is LOUD.
Reviewed in the United States on May 24, 2025 by bonzodogdoodah
Color: P20-Black
Love this little charger. Has a great display. Easy to program for the kind of battery you're charging. It doesn't take up a ton of space on my workbench. I'll keep using it to charge 100AH lithium solar batteries until the solar panels are installed on our off-grid hunting shack.
Reviewed in the United States on June 15, 2025 by BarbG
Color: P20-Black
My new favorite charger. I was skeptical that something so small could push 20 amps, but according to the built in display it regularly hits 16A+. The fan moves a lot of air, but I don't think it's unreasonable for such a small package. I can feel it moving a good bit of heat and it turns off when it's not attached to anything. Main thing I'm happy about is it doesn't do a mandatory 10 minute desulfation/testing cycle at the beginning of every charge like one of my 10A chargers does. Sometimes it doesn't matter but sometimes I want to start charging immediately - I frequently use this to keep a car battery from dying when I need to have key on engine off for an extended period. I appreciate having some control over the charge, something omitted from a lot of "smart" chargers these days. I can also select 5A, 10A, or 20A for 12v batteries which is nice. This is exactly what I was looking for. The only con I can think of is that the charge percentage seems to mean nothing and it usually just flashes 80% or 100% regardless unless a battery is completely dead. I can get a good enough idea by the charge voltage and current so I don't mind that much. Update: I see it sometimes pushing 20A, then back down to about 15-16A when the battery is nowhere near fully charged (and can take 40A+ as verified with another charger). I suspect it's throttling itself when it gets a little too warm and could just use a bigger fan but I haven't spent too much time investigating it. I may try giving it some more air to see if it'll maintain a higher current. Also have been testing the repair feature on a couple batteries with issues and have seen good results. It probably can't bring back a trashed battery, but it does seem to help a weak one. I first tried this feature on a Noco charger and didn't notice much difference, but I think that's because the Nocos will turn it off after ~4-5 hours (which isn't the worst idea especially for routine-ish maintenance), while this one will run until you stop it or it thinks the battery is fixed. How does it decide that? No idea, but it's only stopped itself on one battery that I've used it on so far. I let it repair one for ~9 hours a day for a week straight (under supervision!) and saw improvement from ~300CCA to ~550CCA and holding higher voltage at rest. Last thing. I noticed some reviewers mentioned the cables pulling out of the plug at the charger and exposing bare wires, and yes the first one I bought is developing this issue. I'm watching it closely and will be making a repair or retiring it when it starts to get questionable. I've since bought two more of these and noticed the plug has been updated to prevent this from happening. Also my newer ones modulate the fan speed according to charge current (and temperature I assume), so it seems like they've been upgraded all around. Update again: Changing my rating because after buying a 4th one (yeah I know) this version seems to have gone back a step. Will not attempt to charge batteries below ~7.5v, just sounds of relays clicking (which old ones didn't have) then shuts off and says it's full. I originally said the new version doesn't float and that seems to not be entirely accurate, but it is different than before. I'll be doing some testing on that...
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Reviewed in the United States on September 22, 2023 by duke
Color: P20-Black
Batteries usually come not fully charged or at a "storage charge" so i needed a charger fast. Ordered this thing and it came in 2 days! pressed my battery type and it charged my battery in 5 hours Perfect. Thing is a bit loud, small compact enough to misplace but good quality. Came in handy when i needed it
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Reviewed in the United States on June 29, 2025 by Anon
Color: P20-Black
The media could not be loaded. Update July 24 2024: Today I decided to charge a battery that discharged because I didn't drive the car for a week. I use the 100AH Lithium Ion Phosphate battery in my car to run a 12V refrigerator and noticed that during charging I had a very hard time opening my car doors. My car (2018 Honda Accord) has a key fob that stays in your pocket and you walk up and just pull on the handle and the door opens. Well, this doesn't work when I was charging. I had to unplug the charger from electrical outlet to open the doors. It appears that this charger causes radio interference with car key fobs and I also found out today that my remote thermometer that hangs on the tree outside would not update unit in the home during charging. So this charger is not well designed and causes radio interference. This is the first time I experienced this with a charger. Update Jan 16 2024: I did some more testing. The battery I use is exactly 230 AH (2.944 KWH) in capacity. Using this changer on the 20 amp setting (in reality almost 15 amp) I charged the battery to full. I ran a 10 amp load with a electronic load test device to drain the battery until the BMS (battery management system) cuts off the connection to prevent damage. Result was 230 AH as rated by manufacturer. I used the charger again and charged the battery to full after draining it and getting 230 AH (2.944 KWH) capacity. I measured how much electricity from my 120V AC wall outlet it takes to charge the battery back to 230AH (2.944KWH) and i was shocked. It took just over 17 hours and 3.901 KWH to get the battery recharged. So this charger wastes 25% of AC wall electricity to recharge batteries. I honestly don't know if that is normal or not but one thing for sure is that the fan blows out a lot of wasted heat during charging. I assume there is some loss in conversion but that seems a bit high. I am not 100% sure. I have to lower the rating to 1 star due to not charging at 20 amps and not appearing to be efficient and loud. See my video. Original review Jan 7 2024: This charger falls short on the max amp charge rating. For me charging my 230Ah LiFePO4 battery the 3 charge settings gave me approximately 5.2 amps, 9.6 amps and 14.7 amps. I only got close to 20 amps in the first few minutes of the charge. During the main charge phase it only hovered in the 15 amp range My battery has a recommended charge of 40 amps but charging LiFePO4 batteries at a slower rate will extend their life so that's why I bought the charger. I wanted to use 20 amps. I have not decided if I will keep it.
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Reviewed in the United States on January 7, 2024 by Paul
Color: P20-Black
Upgraded travel trailer to LiFePo batteries and needed lithium battery charger. This charger works great on all my batteries. Used it on older battery and rejuvenated it.
Reviewed in the United States on June 15, 2025 by Mike Andrews
Color: P20-Black
Great little charger that packs a big punch. Charged a brand new 12.87v 100Ah LiFeP04 battery to 100% in 5 hours just like it said it would. To charge a lithium-iron phosphate battery, you need 20 amps of charging power. This little beast delivers! Selectable charge rates of 5, 10, and 20 amps for different style batteries. This charger also does 24v.
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Reviewed in the United States on July 9, 2025 by Paul C Paul C