e to be equalized.

6. At the finish of this developing charge the gravity should read
1.280 in each cell. If below this, equalize by putting in 1.400
specific gravity acid, or if the contrary is the case and the acid is
above 1.280 add sufficient distilled water until the gravity reads
1.280.

7. After the acid has been equalized and it has stopped rising in
density the voltage of each cell while still on charge at the
finishing rate should read at least 2.5 volts per cell or better.

8. The battery is then ready for service. Just before putting battery
into service, make a high rate discharge test on it. See page 266.

Philadelphia Diamond Grid Batteries

1. Remove the vent plugs and immediately fill the cells With
electrolyte until the level is even with the bottom of the vent tube
in the cover. Do not fill with electrolyte whose temperature is above
90 deg. Fahrenheit. The specific gravity of the electrolyte to be used in
starting batteries varies with the number of plates in each cell, the
correct values being as follows:

Charging Rates

Fill batteries listed in Table No. 1 with 1.270 sp. gr. acid.

TABLE--No. 1

No. of LL-LLR
Plates & LH LM, LMR LT, LTR LS, LSR LG LT LSF
------ ------ ------- ------- ------- --- --- ---
9 2.0 2.5 2.0 2.5 3.0
11 2.5 3.0 2.5 3.5 4.0
13 3.0 3.5 3.0 4.0 2.5
15 3.5 4.0 3.5 4.5 5.5
17 4.0 5.0 4.0 5.5 6.0
19 4.5 5.5 4.5 6.0

Special Battery: 136 USA ... 6. 0 amps.

TABLE NO.2

Fill batteries listed in Table No. 2 with 1.250 sp. gr. acid.

No. LL-LLR LM LT LS S
of Plates & LLH LMR LTR LSR SH ST LSF
--------- ------ --- --- --- --- --- ---
5 1.0 1.0 2.0 1.5
7 1.5 1.5 1.5 2.0 3.0 2.0 1.5
9 4.0
11 5.0

Special Batteries: 330 AA .... 1.0 amps.
524 STD-H2 ................... 1.0 amps.
7 6 SPN ...................... 1.5 amps.

The number of plates per cell is; indicated in the first numeral of
the type name. For instance, 712 LLA-1 is a 7 plate LL. For all
lighting batteries, types S and ST. use 1.210 electrolyte.

2. Allow th