---
product_id: 600637253
title: "20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle"
brand: "haisito"
price: "€ 239.46"
currency: EUR
in_stock: false
reviews_count: 5
category: "Haisito"
url: https://www.desertcart.ie/products/600637253-20amplithiumbatterycharger-12vand24vlifepo4-lead-acid-agm-gel-sla-portable-carbatterycharger-batterymaintainer
store_origin: IE
region: Ireland
---

# 20A max fast charge Supports 12V & 24V batteries Multi-layer safety protection 20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle

**Brand:** haisito
**Price:** € 239.46
**Availability:** ❌ Out of Stock

## Summary

> 🔌 Power up smart, stay charged longer!

## Quick Answers

- **What is this?** 20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle by haisito
- **How much does it cost?** € 239.46 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/600637253-20amplithiumbatterycharger-12vand24vlifepo4-lead-acid-agm-gel-sla-portable-carbatterycharger-batterymaintainer)

## Best For

- haisito enthusiasts

## Why This Product

- Trusted haisito brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built-In Safety Tech:** Temperature sensor plus over-voltage, short circuit & spark protection for worry-free charging.
- • **One-Button Fast Charge:** Effortless start with 4 charging modes tailored for your battery needs.
- • **Smart Battery Maintenance:** Pulse repair & trickle charge extend battery life and keep your power ready to go.
- • **Versatile Voltage & Current:** Adjustable 3-level current (up to 20A) for 12V & 24V batteries ensures perfect power delivery.
- • **Universal Battery Compatibility:** Charges Lithium, LiFePO4, AGM, Gel, SLA & more — ideal for cars, boats, motorcycles, and beyond.

## Overview

The Haisito EF-20 is a compact, portable 20 Amp battery charger compatible with 12V and 24V Lithium, LiFePO4, and lead-acid batteries. Featuring one-button operation, adjustable charging currents, and multi-mode charging including pulse repair and trickle maintenance, it ensures fast, safe, and efficient battery charging. Built-in temperature detection and comprehensive safety protections make it ideal for cars, boats, motorcycles, and more, delivering reliable power maintenance wherever you go.

## Description

20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle : desertcart.in: Car & Motorbike

Review: Känns lite plastig, alltså stel plast inte direkt den bästa. Men laddaren fungerar bra så jag har inget att klaga på. Reconden är jag tveksam till för det tog två dygn innan jag kom upp i 14,5 v så jag fick avbryta jag ville inte utmana ödet. Men bra laddare värd priset. ;-))
Review: Been using for about 6 months now, works great. Mostly mac is 17 and, but that's OK. Connect and forget, turns itself off when done. Nice piece of kit for solar system maintenance 👌

## Features

- One-button start: 12 V 20 Amp, 24 V 10 Amp battery charger charge with four modes with one button to start, the maximum charging current is 20 A, provides fast charging for your battery. And small size is a portable car charger
- 3-level adjustable current: car battery charger can choose suitable charging current yourself, you can choose (12V/5A, 24V/3A) →(12V/10A, 24V/5A)→(12V/20A, 24V/10A). Please choose the appropriate current to charge your battery according to your needs.
- Wide application: trickle charger can be used for most batteries such as lithium, Lifepo4, lead-acid (PB/AGM/GEL/EFB, MF, FLOODED, VRLA, SLA, wet batteries), for: cars, golf carts, motorcycles, electric motorcycles, motor boats, lawn mowers, forklifts, tractors, etc.
- Trickle Charge & Maintainer/Pulse Repair: Maintainer/Pulse Repair to activate your battery, the unique battery protection function allows you to charge your battery quickly and safely, and the trickle charge is the perfect last protection for your battery to be fully charged.
- Temperature detection and multiple protection: with built-in temperature sensor, it can be charged normally from -10°C (14°F) to 40°C (10°F). Built-in multiple detection, temperature protection, low voltage protection, over-voltage protection, short circuit protection, over-current protection, electrostatic spark protection. Allows you to charge without worry.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09ZLD6RJ5 |
| Batteries Included | No |
| Batteries Required | No |
| Battery cell composition | Lithium |
| Brand | Haisito |
| Country of Origin | USA |
| Customer Reviews | 4.4 4.4 out of 5 stars (168) |
| Date First Available | 5 December 2023 |
| Does it contain liquid? | No |
| Item Dimensions LxWxH | 19.4 x 6.8 x 17.1 Centimeters |
| Item Weight | 560 g |
| Item model number | EF-20 |
| Manufacturer | Haisito |
| Model | EF-20 |
| Number of Ports | 1 |
| Product Dimensions | 19.41 x 6.81 x 17.07 cm; 560 g |

## Product Details

- **Brand:** Haisito
- **Colour:** black
- **Item Weight:** 560 g
- **Output Voltage:** 12 Volts
- **Product Dimensions:** 19.4D x 6.8W x 17.1H Centimeters

## Images

![20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle - Image 1](https://m.media-amazon.com/images/I/715MjsPBgbL.jpg)
![20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle - Image 2](https://m.media-amazon.com/images/I/716089-te1L.jpg)
![20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle - Image 3](https://m.media-amazon.com/images/I/71sIRe9do3L.jpg)
![20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle - Image 4](https://m.media-amazon.com/images/I/81im7t1c60L.jpg)
![20AmpLithiumBatteryCharger, 12Vand24VLifepo4, Lead Acid (AGM/Gel/SLA。) Portable CarBatteryCharger, BatteryMaintainer, TrickleChargerandBatteryDesulfatorforCar,Boat,Motorcycle - Image 5](https://m.media-amazon.com/images/I/81cxdEtTBXL.jpg)

## Questions & Answers

**Q: Why does setting it to 5a/10a agm and output into 15a cig-lighter connected to agm battery destroy every electric device in the car? Input: wall outle**
A: I'm sorry, but you don't know how to use this unit properly.  You destroyed everything connected to this unit.   This if for charging a battery.  Separately.   Disconnect everything.  Disconnect the battery.  Then... Charge the battery.  Alone.  Separately. Only connect to the battery, and the battery, alone.  BTW: this is a pretty good battery charger, for many different types of batteries.

**Q: Is it safe to charge my Lifepo4 12v battery at 20a setting?**
A: As long as your battery is 40AH or larger. 

It is incorrect that the battery BMS controls the charging rate.  The BMS will stop the charging completely if the charging voltage exceeds a certein limit but it does not control the charging rate.  

The charger charges at 20A (not really, see below) until the voltage reachs 14.6V and then the current is smaller, maintaining 14.6V.

The problem with this charger is that the wires are too small so you never get 20A.  The most you would get is 15A.

**Q: Is this compatible with charging LTO?**
A: All lithium chemistry is compatible and even better: lead acid needs to be full to last where LIFEPO4 or others last longest at 50%…. Lead acid charging at 80% of a real lithium charge mode… meaning you actually will have a lithium battery for twice as long as a lead acid if you use it in vehicles. It has all the modes in the charger so it will charge it completely full with the charger, which is great if you use it a lot before running a car or using it. Be aware when you let it sit put it at 60%

**Q: I purchased one of these chargers, can I get a second one and run them in parallel**
A: For LIFEPO4 batteries it does not really matter as long as the battery size matches the charging current. Recommended 1/2C meaning half of the Amp hour capacity in amp is the recommended max charging speed. Example 100Ah battery you can charge with up to 50 amp so using 2 20Amp chargers is fine but not 2 35Amp chargers, I would get a 200Ah battery to charge it with 2 35Amp chargers

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by K***T on 1 August 2024*

Känns lite plastig, alltså stel plast inte direkt den bästa. Men laddaren fungerar bra så jag har inget att klaga på. Reconden är jag tveksam till för det tog två dygn innan jag kom upp i 14,5 v så jag fick avbryta jag ville inte utmana ödet. Men bra laddare värd priset. ;-))

### ⭐⭐⭐⭐⭐ Review
*by K***R on 15 January 2026*

Been using for about 6 months now, works great. Mostly mac is 17 and, but that's OK. Connect and forget, turns itself off when done. Nice piece of kit for solar system maintenance 👌

### ⭐⭐⭐ Review
*by R***C on 28 June 2025*

Funziona abbastanza bene anche se le prestazioni non sono ottimali

## Frequently Bought Together

- 20-Amp Car Battery Charger, 12V/24V Lithium, LiFePO4, Lead Acid (AGM/Gel/SLA), Smart Battery Maintainer, Trickle & Pulse Repair, Portable Charging for Cars, Boats, Motorcycles, Golf Carts, Tractors
- LiTime 12V 100Ah TM Low-Temp Protection LiFePO4 Battery Built-in 100A BMS, Group 31 Deep Cycle, Lithium Iron Phosphate Battery Perfect for Trolling Motors, Yacht, Marine, Boat, RV, Home Energy

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-18*