Subaru WRX-STI Owner's Manual page 483

can cause blindness and burns.
Keep flames away:
Before working on or near your
vehicle's battery, extinguish all ci-
garettes, matches, and lighters.
Also, keep the battery away from
flammable items and electrical
sparks. Since batteries emit highly
flammable, explosive hydrogen gas,
any flames or sparks in the vicinity
could cause an explosion.
When working near your vehicle's
battery, take care that metal tools do
not short-circuit the battery's (+) and
(−) terminals or connect the bat-
tery's (+) terminal to the vehicle's
body. A short circuit could create
electrical sparks and lead to an
explosion.
To prevent electrical sparks, all
rings, wristwatches, and other metal
accessories must be taken off be-
fore work is carried out on or near
the battery.
Prevent explosions:
While being charged, batteries emit
highly flammable, explosive hydro-
gen gas. To prevent an explosion,
charge your vehicle's battery in a
well ventilated area and keep flames
away.
1) Cap
2) Upper level
3) Lower level
It is unnecessary to periodically check the
battery fluid level or periodically refill with
distilled water.
However, if the battery fluid level is below
the lower level, remove the cap. Fill to the
upper level with distilled water.
Maintenance and service/Battery
CAUTION
Never use more than 10 amperes
when charging the battery because
it will shorten battery life.
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