with 1.250 electrolyte and balanced to 1.290 at the end of the charge.

[Fig. 172 Philadelphia Radio "B" battery]

The Philadelphia Radio "B" battery, type 224-RB, Fig. 172, has 12
cells contained in a one-piece rubber case. It is shipped dry, and
requires no initial charge. To prepare it for service, the soft rubber
vent caps are removed and 25 c. c. of 1.250 electrolyte poured into
each cell.

U. S. L. RADIO BATTERY

[Fig. 173 U.S.L. Radio "A" battery]

The U. S. L. Radio "A" battery, Fig. 173, uses 1/4 inch positives,
with 3/16 inch intermediate and 1/8 inch outside negatives. Port
Orford cedar separators are used which are four times as thick as the
usual starting battery separator. The case is made of hardwood, and is
varnished to match cabinet work. The electrolyte has a specific
gravity of 1.220. The heavy plates and separators and the low gravity
of the electrolyte are designed to give long life.

Ampere Ampere Hour
Plates Hour Capacity
per Capacity (or intermittent
Type Cell @ 3 Amperes use) Dimensions Weight
---- ---- ----------- ---------------- ---------- ------
DXA-303-X 3 12 20 5-3/16 x 18
7-1/4 x 9-1/4
DXA-305-X 5 40 60 9-1/8 x 7-1/4 39
x 9-1/4
DXA-307-X 7 70 85 11-3/4 x 7-7/16 48
x 9-1/4
DXA-309-X 9 98 115 14-3/8 x 7-7/16 59
x 9-1/4

PREST-O-LITE RADIO BATTERIES

The Prest-O-Lite Co. makes two lines of Radio "A" Batteries. First, an
inexpensive battery, Fig. 174, and a deluxe battery, Fig. 175, which
has a better finish and appearance. Both types have a mahogany
finished case with rubber feet to prevent damaging furniture. A bail
handle simplifies the carrying of the battery. Capacities range from
47 ampere-hours to 127 ampere-hours at a one ampere discharge rate.

[Fig. 174 & 175 Presto-O-Lite Radio "A" battery]

Table of Prest-O-Lite Radio Batteries
-------------------------------------
Hours Discharge at Rate of:
Type 1 Amp. 2 Amps. 3 Amps. 5 Amps. 10 Amps.
------- ------ ------- ------- ------- ----