BATTERY STEP 3. BATTERY CAPACITY (LOAD) TEST Perform battery capacity (load) test using battery test equipment available commercially. NOTE - Always follow manufacturer’s Instructions and precautions when using battery test equipment. A satisfactory capacity (load) test can be made only when battery electrolyte equals or exceeds 1.225 spe- cific gravity when corrected to 26.'7C (80°F). MT-23258 Figure 13 -- Battery Tester a. Disconnect battery cables from battery. (Disconnect ground cable first.) b. Connect tester leads to battery terminals follow- ing tester manufacturer's instructions. c. Apply specified test load to battery for 15 sec- onds or as specified in tester instructions. Test load (amperes) is equal to one-half of the cold cranking amperes at - 1 8°C (9°F) rating of the battery. Specified test loads for "Fleetrite" and "Interna- tional" batteries are listed in SPECIFICATIONS. d. Note voltage reading after 15 seconds (or other specified time interval) under load.  Then remove load. If voltage reading under load is less than per- missible minimums at temperatures listed in Ta- ble 5, replace the battery. If voltage meets or exceeds permissible mini- mum listed in Table 5, clean the battery and return it to service. CHARGING CAUTION - BEFORE ATTEMPTING TO CHARGE A BATTERY, BE AWARE OF ALL THE PRECAUTIONS TO BE FOLLOWED DURING THE CHARGING OP- ERATION.  REFER TO BATTERY CHARGING PRE- CAUTIONS UNDER PRECAUTIONS. ALWAYS FOLLOW BATTERY CHARGER MANU- FACTURER’S INSTRUCTIONS. WHEN POSSIBLE, USE A BATTERY CHARGER WITH ALTERNATOR OR POLARITY PROTECTION THAT PREVENTS CHARGING THE BATTERY IN REVERSE POLARITY. Two methods of recharging a battery, the Slow Charge Method and the Fast Charge Method, are described below. The charge a battery receives is equal to the charge rate in amperes multiplied by the time in hours.  Thus a five ampere rate applied to a battery for ten hours would be a 50 ampere-hour charge to the battery.  To fully recharge a battery, you must replace the ampere-hours or ampere-minutes removed from it, plus an extra 20%charge.  This is due to the fact that batteries are not 100% efficient on recharging. The Battery Charging Guides, Tables 6 and 7, show approximately how much recharge a fully discharged battery requires.  For partially discharged batteries, re- duce the charging current or charging time (ampere hours) accordingly. For example: If the battery is 25% charged (75% dis- charged), reduce charging current or time by one-fourth (1/4).  If the battery is 50% charged, reduce charging current or time by one-half (1/2). TABLE 5 Ambient Temperature 21^o C 16^o C 10^o C 4^o C -1^o C -70^o  C - 12^o C -18^o C (70^o F) & (60^o F) (50^o F) (40^o F) (30^o F) (20^o F) (10^o F) (0^o  F) above 12 Volt Battery 9.6 9.5 9.4 9.3 9.1 8.9 8.7 8.5 6 Volt Battery 4.8 4.75 4.7 4.6 4.5 4.4 4.3 4.2 Minimum Permissible Voltage CTS-4111B -  Page 12