---
product_id: 94918569
title: "4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer"
brand: "erayak"
price: "€ 16.50"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.sk/products/94918569-4a-12v-smart-battery-charger-automatic-trickle-charger-fast-charging
store_origin: SK
region: Slovakia
---

# 4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer

**Brand:** erayak
**Price:** € 16.50
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** 4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer by erayak
- **How much does it cost?** € 16.50 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/94918569-4a-12v-smart-battery-charger-automatic-trickle-charger-fast-charging)

## Best For

- erayak enthusiasts

## Why This Product

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

## Description

Buy 4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer: Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: It works - Seems to charge my battery just fine keep it there just like it's supposed to
Review: Worked well - Charged battery. Worked well.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07HNCW3C3 |
| Brand | ERAYAK |
| Customer Reviews | 4.3 out of 5 stars 13 Reviews |
| Mfr Part Number | C9304 |
| UPC | 750810196157 |

## Images

![4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer - Image 1](https://m.media-amazon.com/images/I/61uVz8cr4EL.jpg)
![4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer - Image 2](https://m.media-amazon.com/images/I/613EKFB7D5L.jpg)
![4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer - Image 3](https://m.media-amazon.com/images/I/71+Qv9-T4cL.jpg)
![4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer - Image 4](https://m.media-amazon.com/images/I/61GAuSSdkzL.jpg)
![4A 12V Smart Battery Charger Automatic Trickle Charger Fast Charging for Fully Charge and Maintain a Battery at Proper Storage Voltage Without The Damaging Effects by Battery Maintainer - Image 5](https://m.media-amazon.com/images/I/61RLQRAkGtL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works
*by M***S on April 30, 2019*

Seems to charge my battery just fine keep it there just like it's supposed to

### ⭐⭐⭐⭐⭐ Worked well
*by T***Y on June 30, 2019*

Charged battery. Worked well.

### ⭐⭐⭐ 4A 12V model, sleek design, faulty components.
*by J***0 on September 29, 2019*

After 5 Months of use: There is a high pitched ear piercing, squealing sound coming from inside the sealed unit now, and its an obvious early warning of a failed component. I suspect the internal cooling fan is the cause. You cant continue to use a device that has failing internal parts that are signaling a problem in a compromise to the rest of the circuits automated operation. I have to leave it on unattended and now it cant be trusted. I really wanted to depend on this unit for at least a few years. I got a defective device, and now I have to remove the charger from a fixed location and start over AGAIN to replace it..Its really frustrating! EDIT: There is small 12v fan you can replace inside the unit that will eventually fail and you have to replace it from inside the enclosure on the vented port side. With a NEW FAN replacement it continued to operate normally.

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**Shop now:** [https://www.desertcart.sk/products/94918569-4a-12v-smart-battery-charger-automatic-trickle-charger-fast-charging](https://www.desertcart.sk/products/94918569-4a-12v-smart-battery-charger-automatic-trickle-charger-fast-charging)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-07-30*