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35
CRYSTAL® BATTERY USER MANUAL
SYMPTOM
POSSIBLE CAUSES
ACTION / REMEDY
Battery gets hot during CHARGE
or has swollen the case
Cont.
Battery gets hot during DIS-
CHARGE or has swollen the case
Note: 5˚C (41˚F) to 10˚C (51˚F)
from ambient is normal. If the
battery exceeds 20˚C (68˚F) from
ambient or exceeds 65˚C (149˚F),
then STOP charging.
Minor swelling or bowing in the
sides of a battery is normal.
Battery capacity is low and the
charger rushes through bulk &
absorption stages.
- Excessive Temperature
Common in automotive
under bonnet DC to DC charging.
Extreme heat, high loads i.e. two
fridges and long journeys can put
batteries under excessive strain.
- Temperature compensation
- Excessive amperage draw.
- Cable sizes and configurations
- The batteries may have been
undercharged
Never assume a charger is
delivering the correct charge
current. Always measure the
actual current and voltage being
delivered at the terminal.
- Shorted cell
- relocate or cool the batteries.
- Is the swelling a result of the
charger NOT temperature
compensating the charge
voltages at higher temperatures.
- Please apply ohms law remem-
bering that a 1000W load at 12V
= 83 Amps but at 9 volts it = 111
Amps. Refer to the battery data
sheet for discharge specifications.
-Please note the C Rating of the
battery relevant to the discharge
load. Refer to the data sheet for
specifications.
- Check that the cables between
batteries are the correct size AND
that each link cable is exactly the
same length. Also ensure that the
cables (positive & negative) to
and from battery chargers, loads
or busbars are exactly the same
length. Cable imbalance can
cause a battery to fail
prematurely.
- Check that the charge current
and voltages are in accordance
with this user manual and the
batteries data sheet. Pay partic-
ular attention to the charge cur-
rent requirements of the battery.
0.3C or 30% of the C10 rate for
GRGS,HGRGS & GRFT Range
0.2C or 20% pf the C10 rate for
the GREV Range.
- Perform a purification charge
according to the charge
specifications.
Check the batteries resting volt-
age. Each cell is at least 2V. If a
cell is shorted the resting voltage
will reflect this i.e. a 12 volt
battery with a resting voltage
around 10V could indicate
a shorted cell. Shorted cells
become heating elements when
charging.
