DieHard 28.71221 Operator'S Manual Download Page 9

 7 

Charging

Ensure that all of the charger components are in place and in good working 

1. 

condition, for example, the plastic boots on the battery clips.
Connect the battery following the precautions listed in sections 6 and 7.

2. 

Select the appropriate settings for your battery.

3. 

Connect the AC power following the precautions listed in section 8. Make sure to 

4. 

place the charger on a dry, non-flammable surface like metal or concrete.
To disconnect the charger, reverse the above procedure. 

5. 

Manual Charging 

When a Manual Charge is performed, the charger will continue to charge and will not 

shut off. You must keep a visual check on the ammeter to determine when the battery 

is charged. Be sure to monitor the charging process and stop it when the battery is 

charged. Not doing so may cause damage to your battery or result in other property 

damage or personal injury.

CALCULATINg ChARgE TIME

12. 

Use the following table to more accurately determine the time it will take to bring a 

battery to full charge. First, identify where your battery fits into the chart.
CCA = Cold Cranking Amps
RC = Reserve Capacity
AH = Amp Hour
NR means that the charger setting is NOT RECOMMENDED.
Find your battery’s rating on the chart below, and note the charge time given for each 

charger setting. The times given are for batteries with a 50% charge prior to recharging. 

Add more time for severely discharged batteries.

BATTERY SIZE/RATINg

ChARgE RATE/ChARgINg TIME

2 AMP

10 AMP

SMALL 

BATTERIES

Motorcycle,

garden,

tractor, etc.

6 - 12 AH

2 - 4 hrs

NR

12 - 32 AH

4 - 10 hrs

NR

CARS/

TRUCKS

200 - 315 CCA

40 - 60 RC

11 ¼ - 14 ½ hrs

2¼ – 3 hrs

315 - 550 CCA

60 - 85 RC

14 ½ - 18 ¼ hrs

3 – 3¾ hrs

550 - 1000 CCA 80 - 190 RC

18 ¼ - 34 ¾ hrs

3¾ – 7 hrs

MARINE/DEEP CYCLE

80 RC

17 ½ hrs

3½ hrs

140 RC

27 hrs

5½ hrs

160 RC

30 hrs

6 hrs

180 RC

33 hrs

6¾ hrs

MAINTENANCE INSTRUCTIONS

13. 

After use and before performing maintenance, unplug and disconnect the battery 

13.1 

charger (see sections 6, 7 and 8).
Use a dry cloth to wipe all battery corrosion and other dirt or oil from the battery clips, 

13.2 

cords, and the charger case.
Ensure that all of the charger components are in place and in good working condition, 

13.3 

for example, the plastic boots on the battery clips.
Servicing does not require opening the unit, as there are no user-serviceable parts.

13.4 

All other servicing should be performed by qualified service personal.

13.5 

Summary of Contents for 28.71221

Page 1: ...1221 00 99 001008 01 12V Manual Battery Charger Read and follow all Safety Rules and Operating Instructions before Every Use of this Product Save these instructions Sears Brands Management Corporation...

Page 2: ...tes IL 60179 For customer assistance or replacement parts call toll free from 7 am to 5 pm CT Monday through Friday 1 800 732 7764 Table of Contents Section Page IMPORTANT SAFETY INSTRUCTIONS 1 PERSON...

Page 3: ...ces state the hazard Numbered sentences state how to avoid the hazard The icon gives a graphical description of the potential hazard Pursuant to California Proposition 65 this product contains chemica...

Page 4: ...f the battery Review the cautionary markings on these products and on the engine This charger employs parts such as switches and circuit breakers that tend to produce 1 12 arcs and sparks If used in a...

Page 5: ...ose or mouth Add distilled water to each cell until the battery acid reaches the level specified by the 3 4 battery manufacturer Do not overfill For a battery without removable cell caps such as valve...

Page 6: ...cted to the chassis vehicle 6 4 frame If the negative post is grounded to the chassis as in most vehicles see step 6 5 If the positive post is grounded to the chassis see step 6 6 For a negative groun...

Page 7: ...cting 7 7 procedure and break the first connection while as far away from the battery as practical A marine boat battery must be removed and charged on shore To charge it onboard 7 8 requires equipmen...

Page 8: ...activity on the meter although the meter does not have the resolution to display this low rate For the 2 amp charge rate a triangle has been provided Its accuracy has been calibrated for use with sma...

Page 9: ...anking Amps RC Reserve Capacity AH Amp Hour NR means that the charger setting is NOT RECOMMENDED Find your battery s rating on the chart below and note the charge time given for each charger setting T...

Page 10: ...ery is defective will not accept a charge 2 amp charge rate is being used Plug the charger into an AC outlet Check for open fuse or circuit breaker supplying AC outlet Check power cord and extension c...

Page 11: ...normal condition BEFORE RETURNING FOR REPAIRS 16 When a charging problem arises make certain that the battery is capable of accepting 16 1 a normal charge Double check all connections the AC outlet f...

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