Ford Explorer, Maintaince And Repair Manual, Page: 65 / 1119

Do not smoke or all open flames/sparks near a battery; the gases contained in the battery are very explosive
and, if ignited, could cause severe injury or death.
All batteries, regardless of type, should be carefully secured by a battery hold−down device. If not, the
terminals or casing may crack from stress during vehicle operation. A battery which is not secured may allow
acid to leak, making it discharge faster. The acid can also eat away at components under the hood.
Always inspect the battery case for cracks, leakage and corrosion. A white corrosive substance on the battery
case or on nearby components would indicate a leaking or cracked battery. If the battery is cracked, it should
be replaced immediately.
GENERAL MAINTENANCE
Always keep the battery cables and terminals free of corrosion. Check and clean these components about once
a year.
Keep the top of the battery clean, as a film of dirt can help discharge a battery that is not used for long
periods. A solution of baking soda and water may be used for cleaning, but be careful to flush this off with
clear water. DO NOT let any of the solution into the filler holes. Baking soda neutralizes battery acid and will
de−activate a battery cell.
Batteries in vehicles which are not operated on a regular basis can fall victim to parasitic loads (small current
drains which are constantly drawing current from the battery). Normal parasitic loads may drain a battery on a
vehicle that is in storage and not used for 6−8 weeks. Vehicles that have additional accessories such as a
phone or an alarm system may discharge a battery sooner. If the vehicle is to be stored for longer periods in a
secure area and the alarm system is not necessary, the negative battery cable should be disconnected to protect
the battery.
Remember that constantly deep cycling a battery (completely discharging and recharging it) will shorten
battery life.
BATTERY FLUID
Check the battery electrolyte level at least once a month, or more often in hot weather or during periods of
extended vehicle operation. On non−sealed batteries, the level can be checked either through the case (if
translucent) or by removing the cell caps. The electrolyte level in each cell should be kept filled to the split
ring inside each cell, or the line marked on the outside of the case.
HOW TO USE THIS BOOK
PRECAUTIONS 51