- Yuasa Battery, Inc. Automobile Battery Charger User Manual

Remember: unlike
a conventional
battery, the sealed
VRLA battery won’t
be topped off
during its life.
Never pry off
sealing caps: it’s
dangerous and
damaging.
✘
4. Check the electrolyte flow.
Keep the container in
place for 20 minutes or
longer until it empties
completely. If no air bubbles
are coming up from the filler
ports, or if container cells
haven’t emptied completely,
tap the container a few times. Don’t remove the contain-
er from the battery until it’s empty. The battery requires
all the electrolyte from the container for proper operation.
Make sure the electrolyte container empties completely.
5. Remove the container. For batteries 3 - 12 AH,
let stand for at least 30 minutes. For batteries
greater than 12 AH, allow the battery to
stand a minimum of 1 HOUR. This allows the
electrolyte to permeate into the plates for optimum
performance. Yuasa sealed VRLA batteries have the amp
hours printed right on the front of the battery.
6. Newly activated sealed VRLA batteries
require an initial charge. After adding electrolyte,
a new battery is approximately 80% charged. Place cap
strip loosely over the filling holes as shown in drawing
above. Immediately charge your battery after the “stand”
period, to bring it to a full state of charge. See
“Char
ging a Newly Activated Sealed VRLA
Batter
y” on page 31.
✘
27
Open Circuit Voltage Characteristics
Immediately after Electrolyte Filling
246810
Standing Time (minutes)
Open Circuit Voltage (v)
About 30 Seconds
13
12
11
10
0
Place
cap strip loosely
over filling holes
5
SECTION
Sealed VRLA
Batteries
After charging is completed, press down firmly
with both hands to seat the caps (don’t pound
or hammer).
The battery is sealed. There is no need to remove the strip
of caps or add electrolyte for the life of the battery.
7. The graph below shows an open circuit voltage
characteristic of a sealed VRLA battery just after the elec-
trolyte is filled.
If the battery is only filled with electrolyte, but not being
given a supplementary charge, the open circuit voltage
will be somewhere around 12.5 to 12.6v, as shown in
the graph below. The reasons for the voltage being
low are that:
●
The capacity reached by filling with
electrolyte is about 80% of the fully
charged capacity.
●
The electrolyte around the plates gets its
concentration lowered temporarily.