Optimate Pro4 Duo, Instructions For Use Manual

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IMPORTANT SAFETY INSTRUCTIONS FOR CANADA & USA. 

SAVE THESE INSTRUCTIONS. THIS MANUAL CONTAINS IMPORTANT SAFETY 

AND OPERATING INSTRUCTIONS FOR BATTERY CHARGER.

AUTOMATIC CHARGER FOR 12V LEAD-ACID AND 12.8V LIFEPO

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 (LITHIUM FERROUS 

PHOSPHATE / LITHIUM IRON PHOSPHATE) BATTERIES.

DO NOT USE FOR NiCd, NiMH or any other type of Li-Ion or NON-

RECHARGEABLE BATTERIES.

1. 

CAUTION

 : DO NOT CONNECT TO GROUND.

2. For indoor use only. Do not expose charger to rain or snow.
3. Use of an attachment not recommended or sold by the battery charger manufacturer may result in a risk of fire, electric shock, or 

injury to persons.
4. To reduce risk of damage to electric plug and cord, pull by plug rather than cord when disconnecting charger.
5. An extension cord should not be used unless absolutely necessary. Use of improper extension cord could result in a risk of fire 

and electric shock. If extension cord must be used make sure that:  

a) pins on plug of extension cord are the same number, size and shape as those of plug on charger,  b) the extension cord is 

properly wired and in good electrical condition, and  c) the conductor wire size is large enough for the AC ampere rating of the 

charger as specified in the table below.

AC INPUT RATING IN AMPERES

Equal to or                         But 

greater than 

less than

LENGTH OF 

CORD, FEET (m)

 AWG 

SIZE OF 

CORD

2A

3A

 25 (7.6)  

 50 (15.2) 

100 (30.5) 

18

18

14

6. Do not operate charger with damaged cord or plug - replace the cord or plug immediately.
7. Do not operate charger if it has received a sharp blow, been dropped,or otherwise damaged in any way; take it to a qualified 

serviceman.
8. Do not disassemble charger; take it to a qualified serviceman when service or repair is required.  

Incorrect reassembly may result in a risk of electric shock or fire.
9. To reduce risk of electric shock, unplug the charger from outlet before attempting any maintenance or cleaning. Turning off 

controls will not reduce this risk. Clean only with slightly moist, not wet, cloth. Do not use solvents.
10. 

Warning

 - risk of explosive gases. a) working in vicinity of a lead-acid battery is dangerous. Batteries generate explosive 

gases during normal battery operation. for this reason, it is of utmost importance that you follow the instructions each time you use 

the charger.   b) To reduce risk of battery explosion, follow these instructions and those published by the battery manufacturer and 

manufacturer of any equipment you intend to use in vicinity of the battery. Review cautionary marking on these products and on 

engine.

11. PERSONAL PRECAUTIONS.

a) Someone should be within range of your voice OR close enough to come to your aid when you work near a battery.    b) Have 

plenty of fresh water and soap nearby in case battery acid contacts skin, clothing or eyes.   c) Wear complete eye protection and 

clothing protection. Avoid touching eyes while working near a battery.   d) If battery acid contacts or enters eye, flood eye with cold 

running water for at least 10 minutes and get medical attention immediately. If battery acid contacts skin or clothing, wash 

immediately with soap & water. If acid enters an eye, immediately flood eye with running cold water for at least 10 minutes & get 

medical attention immediately.   e) NEVER smoke or allow a spark or flame in vicinity of battery or engine.   f) Be extra cautious to 

reduce risk of dropping a metal tool onto battery. It might spark or short-circuit battery or other electrical part that may cause 

explosion.   g) Remove personal metal items such as rings, bracelets, necklaces,  and watches when working with a battery. A 

battery can produce a short-circuit current high enough to weld a ring or the like to metal, causing a severe burn.   

i) NEVER charge a frozen battery.

12. PREPARING TO CHARGE

a) If necessary to remove battery from vehicle to charge,always remove grounded terminal from battery first. Make sure all 

accessories in the vehicle are off, so as not to cause an arc. 

b) Be sure area around battery is well ventilated while battery is being charged. Gas can be 

forcefully blown away by using a piece of cardboard or other non-metallic material as a fan.

c) Clean battery terminals. Be careful to keep corrosion from coming in contact with eyes.  d) Add distilled water in each cell until 

battery acid reaches level specified by battery manufacturer. Do not overfill. For a battery without removable cell caps, such as