Great Planes Triton Jr. Charger - GPMM3152 - Manual (Page 17)

1. At the default “NiCd CHARGE” screen, press BATT TYPE four
times to find the “Pb CHARGE” screen.
2. Two values can be adjusted on the Pb charge screen. Press
ENTER to cause the charge current value to flash. Press INC+ or
DEC- to change this value (0.1 – 5.0 amps). Note: “0.1A” is the same
as 100mA. “0.8” is the same as 800mA, etc. For 12V 7Ah lead-acid
field batteries, a charge current of 0.5A to 1.0A should safely, fully
charge a battery in 7 to 14 hours.
3. Press ENTER to cause the voltage value to flash. Most hobby field
batteries have a nominal rated voltage of 12V. Make sure the voltage
marked on the battery matches the voltage setting on-screen. To
change this value, press INC+ or DEC-. Press ENTER, or wait 5
seconds and Triton Jr. will automatically confirm both settings.
4. To START CHARGE, press and hold START for 2 seconds.
“BATTERY CHECK, PLEASE WAIT…” will show briefly, and
Triton Jr. will start charging if the battery is in suitable condition.
5. When finished charging, the screen will show “END” and tones
will sound for 10 seconds. The battery should now be ready for
use. Triton Jr. will display details about the charge data for your
battery, including charge capacity, elapsed charge time, etc.
Other data measured during charge can be viewed in the DATA
VIEW screens shown on page 20.
CHARGING Pb (LEAD-ACID) BATTERIES
17
NOTES FOR CHARGING Pb BATTERIES
• Lead-acid batteries use the “constant current / constant voltage”
method (cc/cv) as explained in the section for lithium batteries.
However, different voltage levels are used for evaluating the condition
of Pb batteries.
• Lead-acid batteries do not need trickle charge, and therefore no such
feature exists.
• Lead-acid batteries have a nominal voltage of 2.0V per cell. For most
field batteries, even though you cannot see any individual “cells”,
there are 6 cells internally. At 2.0V per cell, this makes a total field
battery voltage of 12V.
• For lead-acid batteries rated at 12V or greater, the actual amount of
current delivered to the battery might be limited due to the charger’s
maximum rated output power. This is normal, due to various possible
circumstances such as the condition of the battery, limitations of the
input power source, charge connector/connection, etc.