Polaris ACE 150 EFI (2018 year). Manual - part 21

88

MAINTENANCE

Battery

Battery Removal

1. Access the battery through the left rear 

wheel well. 

2. On conventional batteries, remove the 

battery vent tube (sealed batteries do not 

have a vent tube).

3. Disconnect the black (negative) battery 

cable first.

4. Disconnect the red (positive) battery cable 

last.

5. Lift the battery out of the vehicle. Be 

careful not to tip a conventional battery sideways, which could 

spill electrolyte.

NOTICE: If electrolyte spills, immediately wash it off with a solution of one 

tablespoon baking soda and one cup water to prevent damage to 

the vehicle.

Battery

89

MAINTENANCE

Battery

Battery Installation

Using a new battery that has not been fully charged can damage the 

battery and result in a shorter life. It can also hinder vehicle 

performance. Follow the battery charging instructions on page 91 

before installing the battery.
1. Ensure that the battery is fully charged.
2. Place the battery in the battery holder.
3. On conventional batteries, install the battery vent tube. The vent 

tube must be free of obstructions and securely installed. Route the 

tube away from the frame and vehicle body to prevent contact 

with electrolyte.

Battery gases could accumulate in an improperly installed vent tube and 

cause an explosion, resulting in serious injury or death. Always ensure 

that the vent tube is free of obstructions and is securely installed as 

recommended.

4. Coat the terminals with dielectric grease or petroleum jelly.
5. Connect and tighten the red (positive) cable first.
6. Connect and tighten the black (negative) cable last.
7. Verify that cables are properly routed.

90

MAINTENANCE

Battery

Battery Storage

Whenever the vehicle is not used for a period of three months or more, 

remove the battery from the vehicle, ensure that it's fully charged, and 

store it out of the sun in a cool, dry place. Check battery voltage each 

month during storage and recharge as needed to maintain a full charge. 

See page 91.

Tip: Battery charge can be maintained by using a POLARIS Battery Tender 

charger or by charging about once a month to make up for normal self-

discharge. Battery Tender can be left connected during the storage 

period, and will automatically charge the battery if the voltage drops 

below a pre-determined point. See page 102

 

for the part numbers of 

POLARIS products.

Battery Fluid (Conventional Battery)

A poorly maintained battery will 

deteriorate rapidly. Check the battery fluid 

level often. Maintain the fluid level 

between the upper and lower level marks.
Add only distilled water. Tap water 

contains minerals that are harmful to a 

battery.

Lower 

Mark

Upper 

Mark

91

MAINTENANCE

Battery

Battery Charging

The following battery charging instructions apply only to the 

installation of a sealed battery. Read all instructions before proceeding 

with the installation of this battery.
The sealed battery is already filled with electrolyte and has been 

sealed and fully charged at the factory. Never pry the sealing strip off 

or add any other fluid to this battery. 
The single most important thing about maintaining a sealed battery is 

to keep it fully charged. Since the battery is sealed and the sealing strip 

cannot be removed, you must use a voltmeter or multimeter to 

measure DC voltage.

An overheated battery may explode, causing severe injury or death. 

Always watch charging times carefully. Stop charging if the battery 

becomes very warm to the touch. Allow it to cool before resuming 

charging.

For a refresh charge, follow all instructions carefully.
1. Check the battery voltage with a voltmeter or multimeter. A fully 

charged battery will register 12.8 V or higher.

2. If the voltage is less than 12.8 volts, recharge the battery at 1.2 

amps or less until battery voltage is 12.8 or greater. 

Tip: When using an automatic charger, refer to the charger manufacturer's 

instructions for recharging. When using a constant current charger, use 

the guidelines on the next page for recharging.