62
2. Allow battery to stand for 2-8 hours without charging.
3. Inspect liquid level and add more electrolyte, if necessary.
4. Measure specific gravity with a hydrometer. Table 1 indicates the approximate degree to which the
battery is charged (stated as percent charged) and the approximate ampere/hours of charge which will
be necessary to bring the battery to a fully charged condition.
CHG. REQ.
(IN AMP/HRS)
SP. GR. %
CHARGE
D
1.260 100% 0
1.220 75% 18 A/H
1.160 50% 30 A/H
1.105 25% 45 A/H
• While it is theoretically possible, rarely, if ever, will a dry charged battery be found to be fully charged
when the electrolyte is added.
5. To charge the filled battery, a 2½ A/H charge rate may be used in the initial state of charging. The
charge is then completed with a ½ amp. trickle charge. The approximate charging time for each of these
two charge rates is indicated in Table 2. This table is based on the hydrometer reading taken in 4 above.
SP. GR @
70E
APPROX. CHG.
TIME
@ 2.5 A/H
@ 1/2 A/H
APPROX.
CHG
1.240 2 Hrs plus 10 Hrs
1.220 4 Hrs plus 20 Hrs
1.160 8 Hrs plus 20 Hrs
1.105 10 Hrs plus 30 Hrs
• NOTE: If battery case becomes hotter than 115E (warm to the touch) charge rate must be reduced
immediately. Overheating will cause severe battery damage.
• As a matter of practice, the maximum charge rate depends largely on the air temperature of the area
where the battery is being charged. A charge rate of up to 50% of the total charge required (see Table 1)
can be used IF TEMPERATURE OF THE BATTERY CASE DOES NOT RISE ABOVE THE POINT AT
WHICH IT IS JUST WARM TO THE TOUCH (115E F.). Therefore, the cooler the surrounding air
temperature, the higher the allowable charge rate.
CAUTION:
1. DO NOT OVERCHARGE. Take specific gravity readings frequently during charging period.
2. CONNECT CHARGER CORRECTLY. Positive lead to positive terminal; negative lead to negative
terminal.
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