MH20845
®
Sealed Rechargeable
MODEL PS-1238
12 Volt 3.8 Amp. Hr.
Battery
www.power-sonic.com
B
A
T
T
E
R
Y
M
U
S
T
B
E
R
E
C
Y
C
L
E
D
Pb
NONSPILLABLE
L
HT H
W
6.35
4.75
3.2
0.8
Tolerances are +/- 0.04 in. (+/- 1mm) and +/- 0.08 in. (+/- 2mm) for
height dimensions. All data subject to change without notice.
Physical Dimensions: in (mm)
Features
Absorbent Glass Mat (AGM) technology for superior
performance
Valve regulated, spill proof construction allows safe
operation in any position
Power/volume ratio yielding unrivaled energy density
Rugged impact resistant ABS case and cover (UL94-HB)
Approved for transport by air. D.O.T., I.A.T.A., F.A.A. and
C.A.B. certi ed
U.L. recognized under le number MH 20845
•
•
•
•
•
•
Performance Specifi cations
Nominal Voltage ........................................................................ 12 volts (6 cells)
Nominal Capacity
20-hr. (190mA to 10.50 volts) ....................................................... 3.80 AH
10-hr. (350mA to 10.50 volts) ....................................................... 3.50 AH
5-hr. (640mA to 10.20 volts) ....................................................... 3.20 AH
1-hr. (2.4A to 9.00 volts) .............................................................. 2.40 AH
15-min. (7.4A to 9.00 volts) ................................................................. 1.85 AH
Approximate Weight ........................................................... 3.50 lbs. (1.59 kg)
Energy Density (20-hr. rate) ................................. 1.10 W-h/in3 (67.30 W-h/l)
Specifi c Energy (20-hr. rate) ............................. 13.03 W-h/lb (28.72 W-h/kg)
Internal Resistance (approx.) ...................................................... 45 milliohms
Max Discharge Current (7 Min.) ............................................... 11.4 amperes
Max Short-Duration Discharge Current (10 Sec.) .................. 38.0 amperes
Shelf Life (% of nominal capacity at 68°F (20°C))
1 Month ...................................................................................................... 97%
3 Months ..................................................................................................... 91%
6 Months .................................................................................................... 83%
Operating Temperature Range
Charge .. ........................................................... -4°F (-20°C) to 122°F (50°C)
Discharge ....................................................... -40°F (-40°C) to 140°F (60°C)
Case ...................................................................................................... ABS Plastic
Power-Sonic Chargers ................................................... PSC-12300A, 12500A
PS-1238
www.power-sonic.com
To ensure safe and effi cient operation always refer to the latest edition of our Technical Manual, as published on our website.
All data subject to change without notice.
Terminals (mm)
F1 - Quick disconnect
tabs, 0.187” x 0.032”-
Mate with AMP. INC.
FASTON “187” series
•
12 Volt 3.8 AH
L: 7.68 (195) W: 1.85 (47) H: 2.91 (74) HT: 2.99 (76)
Charging
Cycle Applications: Limit initial current to 1.14A. Charge until battery voltage
(under charge) reaches 14.4 to 14.7 volts at 68°F (20°C). Hold at 14.4 to 14.7
volts until current drops to under 38mA. Battery is fully charged under these
conditions, and charger should be disconnected or switched to “oat” voltage.
“Float” or “Stand-By” Service: Hold battery across constant voltage source of
13.5 to 13.8 volts continuously. When held at this voltage, the battery will seek its
own current level and maintain itself in a fully charged condition.
Note: Due to the self-discharge characteristics of this type of battery, it is
imperative that they be charged within 6 months of storage, otherwise permanent
loss of capacity might occur as a result of sulfation.
Chargers
Power-Sonic offers a wide range of chargers suitable for batteries up to 100AH.
Please refer to the Charger Selection Guide in our specication sheets for “C-Series
Switch Mode Chargers” and “Transformer Type A and F Series”. Please contact our
Technical department for advice if you have difculty in locating suitable models.
Capacity Retention Ratio (%)
Standing Period (Months)
100
80
60
40
0
0 2 4 6 8 10 12 14 16 18 20
40oC
(104oF)
30oC
(86oF)
20oC
(68oF)
5oC
(41oF)
Charging is not
necessary unless
100% of capacity
is required.
Charging before
use is necessary
to help recover
full capacity.
Charge may fail
to restore full
capacity. Do not
let batteries reach
this state.
100
80
60
40
20
0
0 1 2 3 4
Ambient Temperature 20˚C (68˚F)
Float Charging Voltage
2.25 - 2.30 V/Cell
Retention Capacity (%)
Years
120
100
80
60
40
20
0
0 200 400 600 800 1000 1200
Number of Cycles
1. Discharge Current 0.2C (Final Voltage 1.7V/Cell)
2. Charge Current: 0.1C
3. Ambient Temperature: 20oC to 25oC (68oF to 77oF)
Retention Capacity (%)
Discharge
Depth 30%
Discharge
Depth 100%
Discharge
Depth 50%
Discharge Characteristics
Discharge Time vs. Discharge Current
Shelf Life & Storage
Life Characteristics in Stand-By Use
Life Characteristics in Cyclic Use
PS-1238 12 Volt 3.8 AH
®
Further Information
Please refer to our website www.power-sonic.com for a complete range of useful
downloads, such as product catalogs, material safety data sheets (MSDS), ISO
certication, etc..
13.0
12.0
11.0
10.0
9.0
8.0
14.0
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CUSTOMER SERVICE
Tel: +1-619-661-2030
Fax: +1-619-661-3648
customer-service@power-sonic.com
INTERNATIONAL SALES
Tel: +1-650-364-5001
Fax: +1-650-366-3662
international-sales@power-sonic.com
DOMESTIC SALES
Tel: +1-619-661-2020
Fax: +1-619-661-3650
national-sales@power-sonic.com
TECHNICAL SUPPORT
Tel: +1-619-661-2020
Fax: +1-619-661-3648
support@power-sonic.com
Contact Information www.power-sonic.com
0211 1M
© 2011. Power-Sonic Corporation. All rights reserved. All trademarks are the property of their respective owners.
Terminal Voltage (V)
Ambient Temperature 20oC (68oF)
1.2 2.4 6 12 24 36 48 1 2 4 6 8 10 20 4 0
Discharge Time
Final
Voltage
min h
0.19
0.38
0.76
1.9
3.8
7.6
0.19 0.38 0.76 1.9 3.8 7.6
Discharge Current (A)
20
15
10
5
2
1
30
10
5
Discharge Time
40oC (104oF)
20oC (68oF)
0oC (32oF)
min h
10.2V
9.6V
9.0V
8.1V
Final
Voltage
10.5V
