Schumacher 85-2250 User Manual

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5.  Locate charger as far away from battery as charger cables permit.

5.2  Never place charger directly above battery being charged; gases from battery will corrode and 

damage charger.

5.3  Never allow electrolyte to drip on charger when taking gravity readings or filling a battery.

5.4  Operate charger only in well ventilated area, free of dangerous vapors.

5.5  Store charger in safe, dry location and maintain in perfect condition.

5.6  Do not set battery on top of charger or where its acid might drip onto charger.

6.  All switches should be set in OFF position and AC cord should be DISCONNECTED from 

electrical outlet before you connect and disconnect charger clamps. Never allow clamps to 

touch each other.

6.2  When attaching charger clamps, be certain to make the best possible mechanical as well  

as electrical connection. This will tend to prevent clamps from slipping off connections, avoid 

dangerous sparking, and assure safer and more efficient charging. Clamps should be kept clean. 

CAUTION: SETTING SWITCHES TO OFF DOES NOT ALWAYS DISCONNECT CHARGER 

7.  Before working on vehicle, firmly apply emergency brake and place gear shift to NEUTRAL—shift 

an automatic transmission to PARK.

7.2  Locate charger as far away from battery as charger cords permit and position AC and DC cords to 

avoid stepping on or tripping over them and to prevent damage by hood, doors, or moving engine 

parts.

7.3  Stay clear of fan blades, belts, pulleys, and any other parts that can cause physical injury.

7.4  Turn OFF all vehicle loads, including door lights, and correct any defects in car’s electrical system 

that may have caused low battery.

7.5  Check polarity of battery posts. 

POSITIVE (POS., P, +) post usually has larger diameter than 

NEGATIVE (NEG., N,–) post.

7.6  Determine which post of battery is grounded (connected) to chassis. If negative post is grounded 

(as in most vehicles), see paragraph 7.7. If positive post is grounded, see 

 

paragraph 7.8.