1
Overview of the Device
1 - Terminal
2 Check LEDs
3 Charging slots for D, C, AA and AAA batteries
4 + Terminal
5 Check LED for 9 V block battery
6 Input: Connection socket for the power supply unit
7 +/- Terminal for 9 V
8 Cover
9 Operational LED
10 Function switch
11 Display
2
Table of contents
Overview of the Device .........................................................1
Table of contents ..................................................................2
Safety Instructions.................................................................4
Electrical devices require special caution...........................4
In the Case of Malfunctions ..............................................6
Cleaning the unit..............................................................6
Dealing with Rechargeable Batteries ...............................7
Information about this Device ...............................................8
Types of Battery that Can Be Charged...............................8
Labelling of the Battery Types...........................................9
Automatic Recognition of the End of Charging ...............10
Automatic discharging....................................................12
Start-Up ..............................................................................13
Unpacking the unit.........................................................13
Operation ...........................................................................13
Charging NiMH and NiCd batteries ................................14
Charging 9 V block batteries...........................................16
Charging RAM cells ........................................................17
Overview of the approximate charging times......................18
Switching off function ....................................................19
Taking the device out of operation......................................20
Stashing the device away/putting it away.......................20
3
Disposal ..............................................................................21
Packaging.......................................................................21
Device ............................................................................21
Batteries .........................................................................21
Technical Specifications.......................................................22
4
Safety Instructions
Read the Safety Instructions through carefully before bringing
the device into operation.
Pay attention to the warnings in the Operating Instructions.
Always keep the Operating Instructions close to hand. Pass
these Instructions on as well under all circumstances if you
sell or pass on the device.
Electrical devices require special
caution
• Batteries/rechargeable batteries can be dangerous if they
are swallowed. Keep the device and the batteries
inaccessible to small children for this reason.
• Medical assistance must be sought immediately if a
battery has been swallowed.
• Never subject the batteries to excess heat, such as because
of sunshine, fire or similar influences.
• Also keep the packaging away from small children. There
is the danger of suffocation.
• Children should be supervised to ensure that they do not
play with the device. This device is not intended to be
used by individuals with restricted physical, sensory, or
intellectual abilities or a lack of experience and/or
knowledge (including children), unless they are being
supervised by an individual responsible for their safety or
5
have received instructions from such an individual about
how the device is to be used.
• Only use rechargeable metal-hybrid batteries
(NiMH), nickel-cadmium (NICD) or alkaline
batteries (RAM batteries).
• Do not use any batteries in the device that
are not clearly labelled as rechargeable.
There will be the danger of injury and the device
could be damaged if other types of battery are
used.
• Always only use rechargeable batteries (batteries) of the
same type for a charging process!
• Only connect the plug-in power supply unit to a well
accessible 240 V ~ 50 Hz socket.
• Only use the plug-in power supply unit supplied with the
device with the battery charging device. The use of other
plug-in power supply units could lead to damage to the
device.
• Do not cover the plug-in power supply unit, because
otherwise warming and consequently damage to the
plug-in power supply unit could arise.
• You should not use any extension cables to avoid them
being tripped over.
• Keep the device away from moisture, drops of water and
spray. Avoid dust, heat and direct solar radiation, in order
to avoid operational malfunctions.
6
• Use the device exclusively in living or similar areas.
In the Case of Malfunctions
• Detach the plug-in power supply unit from the socket
immediately in the case of damage to the plug, the
charging device or the plug-in power supply unit.
• Do not use the connection cable under any circumstances
in the case of a damaged plug-in power supply unit.
• A damaged plug-in power supply unit must no longer be
used. Replace it by an equivalent plug-in power supply
unit.
• Do not attempt to open and/or repair the device yourself
under any circumstances. Contact our Service Center or
another suitable specialist workshop.
• Have a defective device or a damaged plug-in power
supply unit repaired by a qualified specialist workshop or
contact the Service Center, in order to avoid
endangerment.
Cleaning the unit
• Please detach the plug-in power supply unit from the
socket before cleaning the device. Use a dry, soft cloth to
clean it. Avoid the use of chemical solvents and cleaning
substances, because they could damage the surface and
or the labels of the device.
7
• Also clean the + and – terminals with a dry cloth after
long use, in order to maintain an optimum contact at the
terminals.
Dealing with Rechargeable Batteries
• Do not use any damaged or corroded rechargeable
batteries in the device.
• Rechargeable batteries (batteries) can be dangerous to life
if they have been swallowed. Keep the device and the
rechargeable batteries inaccessible to small children for
this reason!
• Medical assistance must be sought immediately if a
rechargeable battery has been swallowed.
• Rechargeable batteries must be disposed of correctly.
Corresponding containers ready for battery disposal are
located in businesses selling batteries and at the local
collection points for this purpose.
• Avoid contact of the battery fluid with the skin under all
circumstances if a battery is leaking! The battery fluid can
cause skin irritation!
• Remove the leaking battery with a dry, absorbent cloth
and avoid contact with the skin by wearing gloves, for
example.
8
Information about this Device
You can charge 1-4 size AAA/R03, AA/R6, C/R14, D/R20
rechargeable batteries or 9 V block batteries at the same time
with your charging device.
You can also charge a 9 V block battery, in addition to AA/R6
and AAA/R03 batteries, so that 5 batteries will be charged at
the same time.
Types of Battery that Can Be Charged
You can charge NiMH (nickel-metal hydride) and NiCd
(nickel-cadmium) types of rechargeable battery, and RAM
cells (alkaline/manganese).
The charging process is the same in the case of NiMH and
NiCd batteries; but NiCd batteries must be discharged before
recharging.
Please take the approximate charging times of the individual
types of battery to be expected from the Table on p. 18.
ATTENTION!
RAM cells must not be discharged under any
circumstances, because this can shorten the useful
life of the batteries, as far as the loss the ability of
the RAM cells to charge. RAM cells should not be
used no more than half capacity and then be
recharged for this reason.
9
Never place RAM cells in the device if the function switch is at
the NiMH or NiCd position. This could lead to the discharging
of the batteries and therefore to damage to the device.
Labelling of the Battery Types
Rechargeable batteries are labelled in accordance with the IEC
Norm in Europe. Labels taken from the American ANSI Norm
exist apart from this.
The micro, mignon, baby, mono and block size labels are the
most usual. The following Table will give you an overview of
the most usual size and type labels that can be recharged
with this charging device:
Size Labels
Label
Micro Mignon Baby Mono Block
ANSI/ISO AAA/R03 AA/R6 C/R1
4
D/R20 9V
Type Labels
Type Micro Mignon Baby Mono
NiMH HR03 HR6 HR1
4
HR20
NiCd KR03 KR6 KR1
4
KR20
RAM cell LR03 LR6 LR14 LR20
No general IEC type labelling can be established for
rechargeable 9V block batteries. The typical 6F22 label for
non-rechargeable block batteries is frequently used for them.
10
Automatic Recognition of the End of
Charging
This charging device manages the charging time for NiCd and
NiMH type rechargeable batteries separately. This
management is based on the (Minus Delta U) process.
Recognition of the end of charging in accordance
with Minus Delta U (-Δ U)
Differences are described with delta in mathematics. In this
case, Minus Delta U means a negative difference in voltage.
This recognition of the end of charging exploits the following
effects:
The voltage of a battery will increase continuously if it is
being charged with constant electricity. However, if a battery
has been completely charged, its voltage will have reached a
maximum and will decline slightly if there is a further current
flow. This slight decline in voltage will be recognised by the
charging technology and charge will be ended.
NOTE:
The charging time for 9 V block batteries is not
recognised automatically and ends after 10 hours.
You will also be able to establish the charging time
for a 9 V block batteries as follows:
Charging time = (capacity of battery (mAh) / charging
electricity (mA)) x 1.5
11
For example:
You want to charge a 9 V block battery with a capacity of 200
mAh (given on the battery) in the device. This charging
device supplies a current flow of 65 mA (to be found in the
Technical Data). Therefore take 60 mA for the average level of
the current flow.
The formula will now appear as follows:
(200 mAh / 65 mA) x 1.5 = 4.61 h
The charging time will therefore be 4 hours 36 minutes in this
case.
12
Automatic discharging
Batteries will be initially discharged and then recharged in the
NiCd switch position.
NiCd batteries must be discharged before recharging, in
order to avoid the memory effect, in the case of which
batteries not completely charged only retain their capacity up
to the point of the most recent charging.
You will, of course, also be able to discharge NiMH batteries
by setting the function switch to NiCd and placing the
charged NiMH batteries in the charging slots. This is neither
damaging to the rechargeable batteries nor the device,
because NiMH batteries are not subject to any memory effect.
ATTENTION
9 V block batteries cannot be discharged with this
charging device!
The discharging of rechargeable batteries depends on the
total capacity and the remaining capacity. It will therefore
always be different and precise information is not possible.
13
Start-Up
Unpacking the unit
• Remove all packaging material.
ATTENTION!
Do not let young children play with plastic
packaging, to avoid the danger of suffocation!
Make sure during unpacking that the following items have
been included:
• Battery charging device
• Plug-in power supply unit (without illustration)
Always make sure that:
• The device never comes into contact with water, not even
drips or splashes;
• The device is not exposed to direct sunlight for a long
time.
Operation
• Connect the plug-in power supply unit to a well
accessible 230 V ~ 50 Hz socket and plug the connector
into the INPUT socket on the charging device.
The charging device will now carry out a short self-test,
during which all the LEDs and the display symbols will light
14
up at the same time. The operational LED will light up after
this, in order to indicate that there is an electricity supply.
The OK symbol will appear on the display for each charging
slot and the corresponding check LEDs will go out if no
batteries have been inserted.
Charging NiMH and NiCd batteries
• Set the function switch to the NiCd or NiMH battery type.
• Place the rechargeable batteries (batteries) of the NiMH or
NiCd battery type that you want to charge into the
corresponding charging slots.
NOTE:
Do not place more than one rechargeable battery
(battery) into one charging slot!
• The charging status of the batteries inserted will be
recognised and the charging or the discharging process
(only NiCd) will be started after approximately two
seconds. The charging status of battery sizes AAA, AA, C
and D will be indicated as follows in the display:
Check LED
Display
symbols
15
A: Battery is completely charged: battery symbol will be
displayed continuously/green LED will light up and
OK
will be displayed
B: Battery is charged up to 75%: battery symbol will flash/
red LED will light up/the charging process will be indicated
by
CHA
C: Battery is charged up to 50%: battery symbol will flash/
red LED will light up/the charging process will be indicated
by
CHA
D: Battery is charged up to 25%: battery symbol will flash/
red LED will light up/ the charging process will be indicated
by
CHA
E: NiCd is being discharged: battery symbol will flash/orange
LED will light up/the discharging will be indicated by
DIS
F: Defective or incorrect battery recognised/ red LED will flash
and
BAD
will be indicated. Remove the respective battery
from the charging slot immediately in this case.
• The batteries will now be charged and the check LEDs
above the charging slots in which a rechargeable battery
has been placed will light up. The charging time for each
battery will be managed individually during the process.
• The control LED for the corresponding charging slot will
change from red to green and the device will switch to
maintenance automatically after the end of the charging
time, in order to avoid independent discharging in the
charging device. It will now be possible to either remove
the batteries or to leave them in the device.
16
The charging time will depend on the age and the total
capacity of the rechargeable batteries. The maximum
charging time in the device is 10 hours. The device will switch
to maintenance charging after this.
Charging 9 V block batteries
• Set the function switch to the NiMH or NiCd battery type.
• Plug a 9 V block battery that you wish to charge onto the
+ and – terminals in the central charging slot, paying
attention to the correct polarity.
The check LED for 9 V block batteries will shine during the
charging process and will go out when a voltage of
approximately 10 V has been reached or after 10 hours at the
latest. You will also be able to remove the battery from the
device earlier, if you have calculated the optimum charging
time in advance with the formula given in Page 8 of these
Instructions.
• Detach the plug-in power supply unit from the socket and
remove the 9 V block battery from the charging slot after
the charging has been completed.
17
Charging RAM cells
• Set the function switch to the RAM battery type.
• Place the RAM type rechargeable batteries (batteries) that
you want to charge in the corresponding charging slot.
The symbol in the display will be the same as when charging
NiMH or NiCd batteries.
The corresponding check LED above the charging slot will
shine during the charging process. The charging time will not
be limited in accordance with Minus Delta U in the case of
RAM cells, but by reaching the charge voltage for RAM cells.
The check LED will then change from red to green and the
device will switch to maintenance charging.
• Detach the plug-in power supply unit from the socket and
remove the RAM cells from the charging slot after the
charge has been completed.
NOTE:
RAM cells are distinguished by specific
characteristics that can influence their behaviour in
use. Pay attention to the corresponding
information of the respective manufacturer under
all circumstances for this reason.
18
Overview of the approximate charging
times
Battery type Battery
size
Capacity Charging time
NiCd AAA
AA
C
D
500 mAh
800 mAh
2200 mAh
4400 mAh
Ca. 0.5-0.6 h
Ca. 0.8-1.1 h
Ca. 2.2-2.94 h
Ca. 4.4–5.9 h
NiMH AAA
AA
C
D
800 mAh
2300 mAh
3300 mAh
6000 mAh
Ca. 0.8-1.1 h
Ca. 2.3-3.1 h
Ca. 3.3-4.4 h
Ca. 6-8 h
RAM cell AAA
AA
C
D
1.5 V
1.5 V
1.5 V
1.5 V
<1.4 V 2.5 h
<1.4 V 5 h
<1.4 V 6 h
<1.4 V 10 h
The charging time will depend on the age and the total
capacity of the rechargeable batteries. The maximum
charging time in the device is 10 hours. The device will switch
to maintenance charging after this.
Please use NiMH batteries with a capacity of at least
500 mAh exclusively.
19
Use batteries in the following ranges of capacity exclusively:
Battery type Battery size Capacity
AAA 500 – 900 mAh
AA 500 – 2500 mAh
C 500 – 4500 mAh
D 500 – 8000 mAh
Ni-MH
NiCd
9V 120 – 250 mAh
AAA 500 – 1000 mAh
AA 1000 – 2500 mAh
C 2000 – 4500 mAh
RAM
D 2500 – 6000 mAh
Switching off function
This device is equipped with automatic temperature
monitoring that will interrupt the charging process if too high
temperatures arise in the device.
20
Taking the device out of
operation
Stashing the device away/putting it
away
• Detach the plug-in power supply unit from the socket if
you are no longer using the device.
• Remove the rechargeable batteries from the device, if
necessary.
• Close the cover and store the device in a dry place.
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Medion MD 11954 Owner's manual
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