CASE DIMENSIONS:
INCHES (CENTIMETERS)
MODEL
DIAGRAM REFERENCE
A
B
C
D
E
F
G
H
I
J
PT-20CE
9.7
15.25
9.5
1.94
7.78
1.97
14.12
8.7
5.26
4.04
PT-40CE
(24.6)
(38.7)
(24.1)
(4.9)
(19.8)
(5.0)
(24.6)
(35.9)
(13.4)
(10.3)
PT-24-20CE
PT-70CE
12.25
18.33
12.0
2.36
8.78
3.22
17.15
11.13
7.75
6.73
PT-24-35CE
(31.1)
(46.6)
(30.5)
(6.0)
(22.3)
(8.2)
(42.9)
(27.8)
(19.4)
(17.1)
VIII) BATTERY CARE TIPS
Regular maintenance and proper care will assure you reliable service from the most
depended upon and sometimes most neglected items, your batteries and battery
charger. NEWMAR battery chargers are designed to keep your batteries fully charged
but your batteries also need proper regular maintenance to provide a maximum life
of service.
ALWAYS READ AND FOLLOW THE BATTERY MANUFACTURER’S INSTRUCTIONS
Battery Installation
Batteries must be securely mounted to prevent them from falling over when the
vehicle or boat is in motion. A loose battery can do serious damage. Batteries should
be mounted in a battery box to contain any acid spill. Batteries give off a certain
amount of hydrogen gas when they are charging. When concentrated, this gas is
highly explosive. Therefore make sure they are in an accessible place with adequate
ventilation for any hydrogen gas discharge.
Cleaning Batteries
Dirt and electrolyte salts can build up on the top of your batteries. This accumulation
conducts electricity stored in the battery and can cause the battery to discharge by
itself. Therefore, at least twice a year, it is a good idea to disconnect the battery
cables and scrub the battery with a baking soda solution. Rinse with fresh water
and dry with a clean cloth.
You may wish to purchase a set of terminal post corrosion prevention rings. These
are alkali-saturated felt rings that slip over the battery post to reduce corrosion. Do
not apply grease to any part of the battery terminals, but you may use an occasional
light spray of silicone lubricant.
Routine Checks and Maintenance
Batteries should periodically be “exercised” (slowly discharged and then recharged)
to keep them in top condition. New batteries may need to be exercised before they
will be capable of their full rating.
If your batteries are not the sealed type, distilled water should be added to them
whenever needed. The electrolyte should cover the plates by about 1/2", allowing a
small air space at the top. Do not fill the cells up to the filler cap as this could cause
the battery to sputter out electrolyte when it is being charged. Only distilled water
should be used never plain tap water. Tap water contains chemicals and elements
that can alter the properties of the electrolyte, including specific gravity. Some
chemicals may also create an insulating coating on the battery plates which will
retard current flow.
The rate that water is lost by the battery is dependent on several factors; battery
condition, ambient temperature, battery use, charge voltage, etc. It is normal for
batteries which are not maintenance-free to require topping off about once a month.
A battery’s state of charge may be monitored by checking the specific gravity or by
open circuit voltage. You may use the following table to evaluate the condition of
your batteries:
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