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Battery Doctor 20085 - User Manual

Battery Doctor 20085
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Automatic Battery Charger
Switching mode with Micro-controlled
Input:100-140Vac / Output: 12Volt DC
User’s Manual and Important Safety Information
Model: #20085 (SW121080-06)
FEATURES
Congratulations on purchasing an Automatic / Switching Mode Battery Charger.
This Battery Charger is comprised of the latest smart charging technology and incorporates the following
features:
High Frequency Switching Mode
Full time pulse charge output
Microprocessor controlled
Multi charging rate - Selectable
Suits Lead Acid Battery Types: Calcium, AGM&WET, GEL - Selectable
Battery Refresh function - Selectable
Battery Equalisation mode For Calcium battery only
Heavy-duty cables
Corrosion-resistant output connectors and clamps
- - - - - - - - - - - - - - - - - - - WARNING - - - - - - - - - - - - - - - - - - - - -
This charger is designed for indoor use only and should never be exposed to rain.
Make sure you are using proper AC line power voltage.
Do not attempt to use the charger if it has been dropped or damaged.
Never attempt to charge a damaged battery, frozen battery or non-rechargeable battery.
Do not use the charger in a closed area or poorly-ventilated area.
Never smoke, use an open flame, or create sparks near a battery or charger during charging operation as
this may cause an explosion / explosive gas.
Do not operate the charger if the cord or plug is damaged.
Do not disassemble the charger. Take it to a qualified person if a repair is required.
Keep the charger away from infants, children and pets.
Switch (unplug) off the main power supply before connecting or disconnecting the unit to a Battery.
CAUTIONS
Refer to the battery Manufacture’s specific recommended values to determine your Battery Type and for
setting the charging rate.
Check the Battery Manufacture’s specific precautions - such as removing or not removing cell caps while
charging.
Please ensure the correct Battery Type is selected. Do not charge using an incorrect Battery Type Setting.
(For example, do not charge a Gel battery with Calcium battery selection setting as this may damage your
battery)
Someone should be within range of your voice or close enough to come to your aid if working near a
lead-acid battery.
Wear protective goggles and turn your face away when connecting or disconnecting a battery.
If battery acid contacts your skin or clothing, wash immediately with soap and water. If acid enters your eye,
immediately flush the eye with running cold water for at least 10 minutes and seek medical attention
immediately.
To reduce risk of damaging the Battery, avoid dropping any metal tools onto the battery.
Never rest the Battery being charged on top of your Battery Charger.
The Battery Charger should be kept as far away from the Battery as the output cables permit.

Questions and Answers

  • J
    Janice WalkerAug 1, 2025
    Why does my Battery Doctor Battery Charger take so long to charge?
    • P
      Paul LaneAug 1, 2025
      If your Battery Doctor Battery Charger takes too long to charge and the 'full' light doesn't illuminate, it could be due to several reasons. The wrong battery type might be selected, so verify that the charging rate and battery type selection matches the battery. The battery capacity might be too large, or the battery could be defective. In these cases, the battery must be replaced. Also, the 6-hour soft start timer or the 24-hour bulk charge timer might have been reached, indicating that the battery cannot be charged and must be replaced.
  • M
    Michael MooreAug 12, 2025
    What to do if Battery Doctor Battery Charger has no DC output?
    • B
      Briana ThompsonAug 12, 2025
      If the Battery Doctor Battery Charger shows no DC output, it could be due to a short circuit in the output. Check the DC connection between the charger and battery to ensure they are not short-circuiting. Another potential cause is reverse polarity connection. Make sure the alligator clips or ring terminals are connected with the correct polarity.
  • T
    Taylor ClarkAug 22, 2025
    Why is there no charging current in my Battery Doctor Battery Charger?
    • J
      jose97Aug 22, 2025
      If there is no charging current in Battery Doctor Battery Charger, the battery might be severely sulfated. Check the battery's condition and age. Alternatively, the battery may have a damaged cell, requiring replacement if rejuvenation isn't possible. The charger might also be in overhead protection mode; in this case, move the battery and charger to a cooler environment.

Summary

Features

Warning and Cautions

General Safety Warnings

Important safety instructions for indoor use, proper power, and avoiding hazards like explosion gas.

Precautions and Handling

Cautions for battery handling, personal protection, and charger placement to prevent damage or injury.

Control and Indicators

Charging Rate and Battery Type Selection

Buttons to select charge rate and battery type for optimal charging.

Charging Status Indicators

LEDs indicating charging progress, faults, and refresh stages.

Refresh Feature Controls

Button and LED for the battery refresh function.

Recommended Battery Capacity

Operating Instructions

Pre-Charge Check

Check battery electrolyte and ensure ventilated location before charging.

Connecting the Battery Charger

Instructions for connecting the charger to batteries inside or outside a vehicle.

Connecting to Main Power and Settings

Connect to AC power, select charge rate, and battery type.

Charging Stages and Process

Details the charging stages: Soft start, Bulk Charge, Absorption, Equalising, Analysis, Full/Float.

Refresh and Equalisation Processes

Refresh Process Overview

Explains the refresh feature to break down sulphates and extend battery life.

Equalisation Process

Details the equalisation function for Calcium batteries to balance cells.

Disconnecting the Battery Charger

Charger Specifications and Troubleshooting

Charger Specifications

Technical details including input/output voltage, current, battery types, and dimensions.

Troubleshooting Common Problems

Identifies common issues, their indications, possible causes, and suggested solutions.

Battery Doctor 20085 Specifications

General IconGeneral
BrandBattery Doctor
Model20085
CategoryBattery Charger
LanguageEnglish

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