---
product_id: 1721018
title: "Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation"
brand: "battery tender"
price: "R$1039"
currency: BRL
in_stock: true
reviews_count: 8
category: "Battery Tender"
url: https://www.desertcart.com.br/products/1721018-battery-tender-800-is-a-supersmart-battery-charger-that-will
store_origin: BR
region: Brazil
---

# 800mA constant current Waterproof & moisture sealed Shock & vibration resistant Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation

**Brand:** battery tender
**Price:** R$1039
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay charged, stay ahead — the smart charger that never quits!

## Quick Answers

- **What is this?** Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation by battery tender
- **How much does it cost?** R$1039 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/1721018-battery-tender-800-is-a-supersmart-battery-charger-that-will)

## Best For

- battery tender enthusiasts

## Why This Product

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

## Key Features

- • **Smart & Safe:** Built-in IC chip ensures spark-proof, reverse polarity, and short circuit protection for worry-free charging.
- • **Compact Powerhouse:** No bigger than a mouse, delivers a steady 800mA charge for reliable battery maintenance.
- • **All-Weather Warrior:** Fully encapsulated and moisture-proof design keeps your charger safe even in wet, rugged environments.
- • **Plug & Play Convenience:** Includes alligator clips and ring terminals with long cords for easy setup anywhere, anytime.
- • **Versatile Compatibility:** Perfect for ATVs, motorcycles, boats, and all lead-acid battery types including AGM and gel cells.

## Overview

The Battery Tender 800 is a compact, fully-automated SuperSmart battery charger delivering 800mA constant current. Encapsulated in a moisture-proof, shock-resistant epoxy resin, it offers advanced safety features like spark-proof and reverse polarity protection. Ideal for outdoor vehicles and all lead-acid battery types, it ensures reliable, maintenance-free charging in any environment.

## Description

Features and Benefits: Fully automatic maintenance free charging. Mountable and lightweight, this compact 800 mA battery charger has all the charge characteristics of its cousin the Battery Tender Junior. It incorporates highly efficient surface mount technology electronic components. The interior is completely encapsulated, protected from shock, vibration, and moisture by an electrically insulating, thermally conductive, flame retardant, synthetic epoxy resin compound. Its tough, affordable, and a strong, innovative battery charging solution. This charger is no larger than a standard computer mouse yet packs 800 millamps of pure constant current charging power. Coupled with a brain (IC chip), the charger will constantly monitor, charge, and then maintain your battery --- even while totally submersed under water! Perfect for all outdoor types of ATVs, watercraft, motorcycles, boats, or anywhere water is a threat.

Review: Excellent quality - Works fantastic to keep my lawnmower battery charged. It’s weather proof which I want for an outdoor storage space. This is my second one and it works great.
Review: Reliable, automatic "does it all" maintainer it all" - Rugged, durable, and automatic features to keep the battery fully charged and desulphated for years!

## Features

- All the charging characteristics of the Battery Tender Junior: fully-automated “SuperSmart” charging and maintaining, spark proof, reverse polarity protection, and short circuit protection
- The interior is completely encapsulated, protected from shock, vibration, and moisture by an electrically insulating, thermally conductive, flame retardant, synthetic epoxy resin compound
- This charger is no larger than a standard computer mouse yet packs 800 milliamps of pure constant current charging power and is listed in the California Appliance Efficiency Database
- Includes alligator clips and ring terminals, and is perfect for all outdoor types of ATV's, watercraft, motorcycles, boats, or anywhere water is a threat, including lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell).
- AC Power Cord Length: 6 ft.- 18 AWG; DC Output Cord Length: 4.5 ft. - 18 AWG; DC Output Accessory Length: 1.5 ft.
- Solid new addition to the Battery Tender family of charger products
- This compact 800 mA battery charger has all the charge characteristics of its cousin the Battery Tender Junior
- It incorporates highly efficient surface mount technology electronic components
- The interior is completely encapsulated, protected from shock, vibration, and moisture by an electrically insulating, thermally conductive, flame retardant, UL recognized, synthetic epoxy resin compound
- It's tough, affordable, and a strong, innovative battery charging solution

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000CITKCE |
| Best Sellers Rank | #6,751 in Automotive ( See Top 100 in Automotive ) #65 in Battery Chargers |
| Brand | Battery Tender |
| Built-In Media | Waterproof 800 |
| Color | Black/Green |
| Current Rating | 800 Milliamps |
| Customer Reviews | 4.7 out of 5 stars 3,847 Reviews |
| Global Trade Identification Number | 00734357215014 |
| Input Voltage | 120 Volts |
| Item Dimensions D x W x H | 2.75"D x 4.35"W x 1.5"H |
| Item Height | 7.5 inches |
| Item Type Name | Battery Tender Waterproof 800 |
| Item Weight | 1.65 Pounds |
| Manufacturer | Battery Tender |
| Mfr Part Number | BTT022-0150-DL-WH |
| Output Voltage | 12 Volts |
| Product Dimensions | 2.75"D x 4.35"W x 1.5"H |
| Specification Met | DOE, ETL, FCC |
| UPC | 734357215014 |
| Unit Count | 1.0 Count |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Battery Tender
- **Color:** Black/Green
- **Item Weight:** 1.65 Pounds
- **Output Voltage:** 12 Volts
- **Product Dimensions:** 2.75"D x 4.35"W x 1.5"H

## Images

![Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation - Image 1](https://m.media-amazon.com/images/I/51aHBywxhtL.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Questions & Answers

**Q: How long roughly do you think it will take to re-charge dead battery? Been charging for almost 24 hours and light is still amber.**
A: A 'fairly' dead battery should charge up in about 24 - 36 hours. If the battery has access ports, you might want to check the water level (DISTILLED water only). If it is low in any of the chambers, then you would fill that chamber with distilled water up to the bottom of a concave meniscus level at the markers. ( http://en.wikipedia.org/wiki/Meniscus ) If there are NO access ports on the battery (sealed) and the light does not change to green after about 48 hours, you might think about getting a new battery. Make sure that the terminals are clean and that the connections to the charger and to the battery are solid.

**Q: How long will this reach? From recepticle to battery? Also does this come with the "quick connect" cable or just the alligator type clamps.**
A: The power cord to the charger is 6'3" long. The cord from the unit to its end is also 6'3" long. It ends in a quick connect/disconnect plug. The alligator clamp cord plugs into that connector. So the overall length from wall outlet to the battery is about 14'. If that's too short you can order quick connect plug extension cords. They make one extension cord that's 24 feet long. I use an extension cord that's about 2 feet long with a quick connect on one end and two rings on the other. The rings fit onto the bolts of the battery clamps. I leave it connected to the batttery and the other end is accessible through the grille, so that I can plug in the unit without having to open the hood.

**Q: When connecting to the car battery; Should the negative lead be connected to the negative or the engine block/frame of vehicle?**
A: The reason to connect (& disconnect) on a grounded member rather than at the battery is to avoid the risk of a spark igniting any combustible gases that may be surrounding the battery. Although the risk is low with a low amperage charger like this, it's a good practice to make the final connection to a ground remote from the battery. Just ensure it's a GOOD ground. My uncle had a battery blow up in his face (albeit under different conditions) and I can attest it's nothing you soon forget.

**Q: Does the quick disconnect stay attached to the battery while driving the vehicle?**
A: Yes, the pigtail comes with a rubber cover or the pigtail end that is not attached to the battery is a female connector.  Either connector is safe to keep attached to the battery.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent quality
*by M***N on October 31, 2025*

Works fantastic to keep my lawnmower battery charged. It’s weather proof which I want for an outdoor storage space. This is my second one and it works great.

### ⭐⭐⭐⭐⭐ Reliable, automatic "does it all" maintainer it all"
*by P***W on November 2, 2025*

Rugged, durable, and automatic features to keep the battery fully charged and desulphated for years!

### ⭐⭐⭐⭐⭐ Works great, I highly recommend for outdoor use!
*by J***S on May 7, 2014*

I ordered this Battery Tender 800 waterproof charger a couple weeks ago and had installed it onto the battery of my mustang that sits for quite a while between starts and drives. Since the battery was at full charge it litterally took a very short time to go into storage mode and do what it was designed to do. Previous to this item I had the Battery Tender Jr that had failed after approx 6 months BUT, in Deltrons defense, I was using it between my jetski and my mustang. I knew it wasnt designed for outdoor use, especially here in the humidity of southwest Florida ( I did have the forementioned items under a carport and the item covered by the jetski seat or mustangs hood). I never blamed the Deltron company and never left a poor review as I was more to blame for using the wrong device for outside storing. I do also own the Battery Tender Plus and have used it inside my storage shed on my RV battery for about 1.5 years now with no problems at all. Though I have not given the BT800 enough time to write a thorough review I realize that thier prodects are above average for the price and wanted to share my overall experience in general with thier products. I can safely assume the BT800 will surpass its expectations as it was desinged as an outdoor product. My mustang does sit under a carport and the BT800 sits under a closed hood where it will never actually get rained on, come in direct sunlight, chemicals, or any type of water outside of humidity. So since its designed for this and even harsher conditions I feel assured it will give me years of practical use. I will come back periodically to update this review as time goes on. I would recommend any of the Deltron products to anyone who plans to use them in the way they were designed! ***update 2/1/15*** Unit still works perfectly under the stangs hood, keeps the battery charged perfectly so its ready to go when I decide to start or drive it. I still highly recommend this product for anyone needing to maintain a battery that is outdoors!

## Frequently Bought Together

- Battery Tender 800mA 12V Weather Resistant Battery Charger and Maintainer - Marine and Automotive Smart Fully Automatic for Boats Watercraft - Selectable Lead Acid Lithium - 022-0150-DL-WH
- Battery Tender Ring Terminal Harness Accessory Cable - 18 inch Cord Adapter with SAE Quick Disconnect - Easy Quick Convenient for Motorcycles, Cars, ATVs and More - 081-0069-6
- Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-01-24*