io "B" batteries are made in two sizes. Type
22-M-2, Fig. 170, has a capacity of 1.2 ampere hours at 0.04 ampere.
It is designed to operate a receiving set having one detector and two
amplifier bulbs for three to five weeks between charges. The type
22-L-2 battery, Fig. 169, has a capacity of 4.5 ampere hours at 0.25
ampere.

Part No. Type Volts Amp. Hours at 3 Amps. Weight
Intermittent Rate
-------- ---- ----- --------------------- ------
100110 6-HR-5 6 54 A.H. 30 Lbs.
100111 6-HR-9 6 108 A.H. 46 Lbs.
100112 6-HR-13 6 162 A.H. 65 Lbs.
100135 8-HR-5 8 54 A.H. 40 Lbs.
100136 8-HR-9 8 108 A.H. 60 Lbs.
100137 8-HR-13 8 162 A.H. 87 Lbs.
100145 6-HR-3 6 27 A.H. 20 Lbs.

Part No. Type Volts Capacity Weight
------- ------ ----- -------- ------
100148 22-M-2 22 1.2 A.H. at .04 Amps. 6-1/4 Lbs.
100140 2-L-2 22 1.2 A.H. at 25 Amps. 19-3/4 Lbs.

PHILADELPHIA RADIO BATTERIES

[Fig. 171 Philadelphia Radio "A" battery]

The Philadelphia Storage Battery Co. makes both "A" and "B" Radio
batteries. The "A" battery, Fig. 171, uses the standard diamond-grid
plates, and the "Philco Slotted Retainer" used in Philadelphia
starting batteries. The cases of the "A" batteries are made of
hardwood, finished in an ebonite black. Soft rubber insulating feet on
the bottom of the case prevent scratching any table or varnished floor
on which the battery may be set. The instructions for preparing the
Philadelphia "A" battery for service are similar to those given for
the starting and lighting batteries, given on page 228. For the
initial filling, 1.220 electrolyte is used, and the battery charged at
the following rates:

Initial and Recharge Charging Rate
----------------------------------
Type Initial Rate Recharge Rate
---- ------------ -------------
56LAR 1.0 2
56RAR 2.0 3
76RAR 3.0 4.5
96RAR 4.0 6
116RAR 5.6 7.5
136RAR 6.0 9

The final gravity of the electrolyte should be 1.250. However, if the
owner insists on getting maximum capacity, the battery may be filled