SELECT
dial
Turn the dial to set the charging current on the
current setting screen (except TX).
Push the SELECT button to change the mode. Every
time you push the SELECT button, the mode
changes to TX->RX-CHG->RX-DISCHG->RX-
CYCLECHG->GLOW->TX.
LCD display
This display shows various information such as
charging current setting, data of each mode, input
voltage and error messages.
CURRENT
button
Calls the charging current setting screen.
CHG
LED display
It turns on while charging.
(It blinks on and off while
discharging.)
TX/RX/GLOW
LED display
The output data corresponding to the lit LED is
displayed on the LCD display.
(TX: Red, RX: Red/Blue/Red-Blue, GLOW: Orange)
START
button
Charging start/stop button
TX
output connector
Output connector to charge a transmitter battery
RX
output connector
Output connector to charge a receiver
GLOW
output connector
Output connector to charge a glow booster battery
1M23N15202
Notes: Always read this manual before using the charger.
Store this manual where it can be used at any time.
•Copying of part or all of the contents of this manual
without prior permission is prohibited.
•The contents of this manual are subject to change without
prior notice.
•The contents of this manual should be complete, but if you
find any errors or omission, please contact us.
•Futaba is not responsible for the results of use of this
product by the customer.
Thank you for purchasing a CR-2500.
The CR-2500 is a DC charger for the lithium ion battery
LT2F2200 used in Futaba radio control transmitters, and for the nickel cadmium and nickel metal
hydride batteries used in receivers and glow boosters. This battery charger has a function of
discharging the battery for the receivers, and can find the most suitable condition to charge
batteries. But there are things that you must be aware of.
To fully enjoy the performance of the charger and to use the charger safely, please read this
instruction manual thoroughly before use.
Usage precautions
Description of CR-2500 Parts
[Accessories]
The following charging cables (2 types) are supplied with the CR-2500 set.
Use these cables when charging a battery mounted in the fuselage and when charging the battery by connecting
the charger to the charging jack of a transmitter.
Input clip (black)
Cigarette socket
Input clip (red)
*TX and RX or TX and GLOW can be charged simultaneously.
*RX output and GLOW output cannot be used simultaneously. Only the
GLOW side is effective even if a battery is connected to both outputs.
Charging adapter (200cm)
Use when connecting the charger to a battery, etc. mounted
in the fuselage.
(While pressing the side wall)
Never connect the battery in reverse.
•Reverse connection will cause the battery to overheat or will damage the inside of the charger.
Do not add an additional charge after charging.
•AUTO-CUT will not function and the battery will be overcharged, overheated and become extremely
dangerous.
Never get the charger wet.
•The interior of the charger is a precision electronic circuit and entry of water will cause erroneous operation.
If the charger gets wet, always have it repaired.
Do not charge a warm battery.
•Otherwise, the specified charging amount cannot be obtained and the battery performance will not be fully
achieved. Be sure to charge the battery after it has cooled.
Never charge with a current exceeding the nominal capacity (lC) of the rechargeable battery.
•If a battery is charged with a current exceeding 1C, the battery will overheat and deteriorate.
Do not connect two battery packs or more to one output terminal.
•It is extremely dangerous because the batteries will short circuit and AUTO-CUT will not function normally.
When taking power from a car, do not operate the ignition key during charging. Also, do not
charge while the car is in motion.
•Otherwise, it may cause input voltage fluctuations and malfunctions due to vibration, etc. If an abnormality
occurs while the car is running, it won't be coped with and would cause serious accidents.
Do not perform charging with the charger on vinyl, plastic or other materials that melt easily,
on a car seat, or other flammable articles.
•arger itself builds up heat during charging. Also, batteries could also overheat for some reason.
Avoid extremely cold and hot places and the direct sunlight when you charge batteries.
It is recommended to perform charging within the 10 ~ 30
°
C range.
•Otherwise, it may cause abnormal charging and overheat.
When charging a new battery or a battery that has not been used for a long time, AUTO-CUT
may not function. If the battery becomes abnormally hot, stop charging.
•When a nickel cadmium or nickel metal hydride battery is new or has not been used for a long time, the
delta peak, which is the criterion for the end of charging, will be difficult to obtain and may not be detected.
If charging is continued, the battery will be overcharged and become abnormally hot and is extremely
dangerous. When the delta peek is not detected and AUTO-CUT does not function, it may be possible to
detect the delta peak by discharging and charging the battery 2
〜
3 times using a standard charging current
charger.
Charge a battery that has been appropriately discharged. (Except Lithium-ion LT2F2200)
•If the batteries such as nickel cadmium battery for RX/GLOW and nickel metal hydride battery are
repeatedly charged with a charge remaining, they may not return to their original performances. On the
contrary, if the batteries are completely discharged, they may also not return to their original performances.
The criterion for the charge remaining is 0.9V/cell.
Be careful that the cable is not pinched or shorted.
•If the cable is shorted, the battery may heat up and give off sparks.
During charging, check the charging amount on the data screen. When the charging amount
becomes extremely large, stop charging.
•AUTO-CUT may not function for some reason.
Do not let the metal parts of a glow booster touch other conductive parts during charging.
•Shorting is extremely dangerous.
After the end of charging, disconnect the battery from the charger.
Multi Charger
CR-2500
Instruction Manual
Meaning of Special Markings
Pay special attention to safety where indicated by the following marks:
Procedures which may lead to dangerous conditions and cause death/serious injury
if not carried out properly.
Procedures which may lead to a dangerous condition or cause death or serious
injury to the user if not carried out properly, or procedures where the probability of
superficial injury or physical damage is high.
Procedures where the possibility of serious injury to the user is small, but there is a
danger of injury, or physical damage, if not carried out properly.
: Prohibited :
Mandatory
Input cable (cigarette socket/clip)
Use the cigarette socket or clip appropriately.
CR-2500 does not have a power switch.
When the power cable is connected, CR-2500
automatically turns on.
Connect the red clip to the positive side of the input
power supply and the black clip to the negative side.
[Cord storage]
The photograph shows an example of storing cable. To
open and close the cover, push the arrow part in the
photograph. If the cover is forced open, the lock claw
could break off.
(+) side (red)
(-) side (black)
This extension cable is designed
only for the use of Futaba
transmitters embedded with Li-
ion LT2F2200. Do not use this
extension cable for other
purposes.
Keep the power of the
transmitter turned off while you
are charging.
(Emitting radio may cause
malfunctions.)
Do not modify the charging
adapter (extension cable)
.
•If shorted or connected in reverse, CR-
2500 or the battery will be abnormally
heated and damaged.
Do not leave the side while charging. If you notice any abnormality of the charger or battery
during charging, immediately stop charging. If the battery temperature rises to 60
°
C or higher,
it is extremely dangerous. If the battery suddenly becomes hot, immediately stop charging.
•Due to the characteristics of NiCd battery and nickel metal hydride battery, some of them are very hard to
detect their delta-peak. If the charger cannot detect the delta-peak and continues charging, the battery
would be overcharged and become abnormally hot and extremely dangerous.
Features of CR-2500
•CR-2500 can charge the lithium ion battery LT2F2200 used in Futaba radio control transmitters, and
the nickel cadmium and nickel metal hydride battery used in receivers and glow boosters.
•CR-2500 is employing the so-called AUTO-CUT by constant current and constant voltage to manage
charging batteries of the transmitter. It is also employing the so-called AUTO-CUT by the delta
voltage peak detection to manage charging batteries of the receivers and glow boosters.
•CR-2500 can charge simultaneously two batteries, such as a battery for the transmitter and a battery
for receiver or a battery for the transmitter and a battery for the glow lamp booster.
•Charging current for receiver and glow booster is adjustable.
Transmitter: AUTO, Receiver: 0.05A - 2.0A (0.05A step), Glow lamp booster: 1A - 2.5A (0.5A step)
•The input voltage, output voltage, charging current, peak voltage, charging time and charging amount
can be monitored on the LCD screen.
*Each battery voltage shown on the screen is the voltage that is measured at its corresponding output
connector.
*The capacity to be charged varies depending on the environmental temperature and the condition of
the battery itself. Please use the capacity shown on the screen only as a rough idea.
CR-2500 Ratings
•Input voltage:
DC11V~15V (Error will be displayed when the
battery voltage is 10.5V or less.)
•Corresponding batteries:
TX: 2,000mAh (LT2F2200)
RX: 50~2,000mAh (4~6 cells)
GLOW: 1,000~2,500mAh (1 cell)
Input power supply (12VDC power supply)
Use a 12V car battery or a power supply having an output capacity of 6A or more at
DC11~15V as the input power supply.
(Specifications and ratings are subject to change without notice accompanying technical developments.)
•Charging current range:
TX: 0.1~1.5A AUTO
RX: 0.05~2A, GLOW: 1.0~2.5A
•Case size: 151x85x35mm
(Excluding projecting parts and cord compartment.)
•Weight: 365g
Do not use RX/GLOW terminal to charge batteries other than nickel cadmium and nickel
hydride batteries.
•
Charging a noncompliance battery will cause the battery to overheat or give off sparks.
Do not use the charger near materials that may ignite.
•There is a danger of ignition by sparking when the battery is connected or disconnected.
TX charging adapter (70cm)
Use this adapter to charge the battery of the transmitter.
You can use either end of the TX Charge Adapter to
connect to the transmitter or the charger.
Make sure that the direction of the
connecter is correct.
