Battery Doctor 20085 User Manual

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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.