AA00568
user manual
for distributor address see packaging
www.nosram.com
All NOSRAM VTEC LiPo-batteries come with properly sized power-wires incl. plugs. The special NOSRAM x-treme
Race Hardcase packs already have 4mm gold plug socket built into the battery pack. These power connections have
to be used for standard charging and for all applications in the model/device. Be sure to always take care of the wire
colors and the right polarity of the battery as a wrong connection will damage your battery and your speedo. While
soldering, take care that you don´t do any short circuits and that all wires are well insulated.
Note: Only use a reverse polarity protected plug system for the power-wires!
Additionally to the power connections, all NOSRAM VTEC LiPo-batteries are equipped with a so-called EHR-Balan-
cing-port. This EHR-Balancing-port can be used to condition and equalize the individual cells inside a battery pack.
The NOSRAM x-treme Race Hardcase packs use a 2mm gold plug socket, which acts as a cell connection between
the two cells in the pack.
Special balancers or certain chargers use this balancing port to perfectly condition and equalize the individual cells
inside the pack. Please check the user manual of the balancer/charger in order to know how the battery needs to
be hooked up.
Note: The Balancing-port shall not be used for the standard use in the model/device. Only use the power-wires incl.
plugs to power your model/device.
We recommend the use of the NOSRAM LiPo Hardcase balancing wire (No. 95805) when you are using a NOSRAM
x-treme Race. The balancing wire allows to plug in the balancer directly without the need of additional soldering work.
BALANCING-PoRt PIN ASSIGNMeNt:
Dear Customer,
thank you for your trust in this NOSRAM product. By purchasing a NoSRAM VteC Lithium-Polymer Ultra Perfor-
mance 25C battery, you have chosen a high-performance LiPo-battery for your RC model.
LiPo-batteries need special treatment and care. Please read the following instructions carefully before you start
using your NOSRAM VTEC LiPo-battery for the first time and to ensure that your NOSRAM VTEC LiPo-battery always
works up to your full satisfaction. This user guide contains important notes for the installation, the safety, the use
and the maintenance of this product. Thus protecting yourself and avoid damages of the product.
Proceed according to the user guide in order to understand your NOSRAM VTEC LiPo-battery better. Please take
your time as you will have much more joy with your NOSRAM VTEC LiPo-battery if you know it exactly.
This user manual shall be kept in a safe place. If another customer is using this product, this manual has to be handed
out together with it.
1. COnneCTIOn
©
Nosram 2009
3. DIsCHarGInG
4. sPeCIal nOTes FOr HanDlInG
5. sTOraGe
6. InTeresTInG FaCTs aBOuT lIPO BaTTerIes
2. CHarGInG
All NOSRAM VTEC LiPo-batteries are capable of a maximum peak discharge current of 25C. The continous discharge
current for all NOSRAM VTEC LiPo-batteries is 15C. The continous discharge current for the RX-/TX-only types is 3C.
PLeASe Note: Always take care that the battery gets enough cooling when discharging it with high discharge
currents.
You have to take care, that the batteries do not get deep discharged. As soon as the battery voltage falls below
3.00V per single cell, the battery pack gets damaged irrevocably.
With 2S packs, the discharge cut-off voltage under load is 6.0V, with 3S packs it is 9.0V and with 4S packs the
discharge cut-off voltage under load is 12.0V. The battery voltage should never fall below these discharge cut-off
voltages.
If your speed control does not have a special undervoltage protection for LiPo-batteries, you have to stop your
model early enough in order not to deep discharge the battery pack. Therefore stop immediately as soon as you
feel a rapid loss in power.
IMPoRtANt: The max. temperature of the LiPo-battery during discharge must never exceed 65°C (150°F).
• Avoid short-circuits! Short-circuiting the battery results in very high currents, which damage the internal
structure of a LiPo-battery. This leads to a loss of power and capacity.
• Never charge LiPo batteries without a balancer. Charging without a balancer can damage the battery. Please
note, that your limited warranty will void if you charge without balancer.
• Be sure, not to damage the outside of the LiPo-battery. The battery inside the hardcase is only protected by a
heatshrink. The actual Lipo-cell is directly under this heatshrink. If the outer skin of the cell gets damaged, the
battery can no longer be used. Therefore take special care, that no sharp objects like knifes, tools, carbon fibre
edges or similar items can damage the hardcase and/or the cells within it.
• When securing the LiPo-battery inside your model/device, you have to take care that the LiPo-battery does not
get damaged or warped in case of a crash. LiPo-batteries with a hardcase are less mechanical resistant then
NiMH-batteries in a metal can. Therfore pay special attention that the LiPo-battery does not get damaged or
warped by letting it fall down, hitting it, bending it or by similar actions.
• If you want to change the plug system of your LiPo-battery, take care that you only attach the new plugs to
the power-wires directly. Under no circumstances your allowed to solder directly on the tabs of the LiPo-cells.
Please note, that there´s the possibility to void your limited warranty when using a non reverse polarity pro-
tected plug system.
• Never charge several LiPo-battery packs at once with one charger. The different capacities and charge levels can
lead to serious overcharging of the battery, even if you are using a charger with LiPo capabilities.
• Damaged packs cannot be used any longer. If the packs show signs of damage, are bent or similar, do not use the
packs anymore.
• The chemical reaction during charging and discharging a LiPo-battery is not fully reversible. Due to that, LiPo-
batteries loose capacity during their life-span. This is normal and not a manufacturing nor production fault.
DISPoSAL Note: Damaged packs or packs, which can no longer be used are hazardous waste and have to be disposed
accordingly. Do not dispose the batteries in your household waste. Completely discharge the batteries and hand
them over to a designated collection point.
NOSRAM VTEC LiPo-batteries do not have a memory effect and only a very low self-discharge rate. Therefore these
batteries can be stored over a longer period of time without special treatment. You only have to take care, that the
batteries do not get stored completely empty.
For a storage over a longer period of time, we recommend to charge the battery up to 50% of the nominal capacity.
Therefore fully discharge the battery pack and then partially charge it with a charge current of 1C for 30 minutes. In this
condition, the battery can be stored at least half a year at 25°C room temperature without the need of recharging it.
For a storage over a short period of time, you also have to pay attention, that the battery is partially charged. Never
store the battery completely empty.
Even if you are using your battery regularly every week, always pay attention that the battery is partially charged
with at least 30% of the nominal capacity during storage. A partial charge with 1C charge current for 20 minutes is
sufficient in this case, if the battery was competely empty before.
If you pay attention to the above mentioned notes, you can enjoy your NOSRAM VTEC LiPo-battery for a very long time.
• LiPo batteries shall only be charged at a temperature between 0-45°C. If this will not be observed, the cycle life
of the battery will be reduced drastically.
• The single cell open voltage of a fully charged LiPo battery is 4.2V. The single cell open voltage of a 50% partial
charged LiPo battery is approx. 3.85V. The single cell open voltage of an empty LiPo battery is approx. 3.3V.
• A voltage below 3.3V per cell without load is in either case harmful for a LiPo battery. Therefore always avoid
voltages below 3.3V per cell.
• It is not visible from the outside when a LiPo battery gets overcharged. The only way to find this out is to measure
the voltage of the LiPo battery. The battery does not heat up nor does it swell when it gets overcharged. There-
fore always check the battery voltage during charging. If it exceeds the max. charging voltage stop the charging
process immediately and check all settings.
• We recommend to stop discharging a Lipo battery if the remaining capacity reaches 30% of the nominal capacity.
With this, LiPo batteries will have the max. possible cycle life. Real-Life application showed, that the cycle life of
LiPo batteries is reduced if the battery always gets completely discharged. This phenomenon can be seen with
all types of LiPo batteries.
All NOSRAM VTEC LiPo-batteries can be charged with a maximum current of 1C*. For charging, only use chargers,
which are specially designed and developed for LiPo-batteries. These chargers charge the battery with the max.
current till the battery reaches the max. charging voltage. The charger then reduces the charging current until the
battery is fully charged. This charging method is called CC/CV (Constant Current/Constant Voltage).
AtteNtIoN: Under no circumstances use NiMH/NiCd-chargers for charging LiPo-batteries! These chargers do not
reduce the charging current and therefore ultimately lead to overcharging the battery!
NOSRAM VTEC LiPo-batteries do not heat up during charging. It is normal, that the battery still has ambient tem-
perature when it is fully charged. If the battery heats up during charging or warps, immediately stop charging it. A
Balancer which monitors the voltage of each single cell is mandatory during the charge of LiPo batteries.
AtteNtIoN: Never charge your LiPo battery without a balancer directly connected to the balancing port of your
battery, unless your charger is already equipped with a balancer.
The maximum charging voltage for each single LiPo-cell is 4.20V. If the battery reaches this voltage, the charge
current has to be lowered. This is automatically done by the charger. If the charge current reaches 0.05 - 0.1C*,
the battery is fully charged. All NOSRAM VTEC LiPo-batteries consist of multiple LiPo-cells. You can see the max.
charging voltage in the table below. We advise the following settings for charging our NOSRAM VTEC LiPo-batteries:
PLeASe Note: You can use your NOSRAM VTEC LiPo-battery several times a day. However be sure, that the battery
has completely cooled down to ambient temperature, before re-charging it again.
NOSRAM VTEC LiPo-batteries do not have a memory effect and only a very low self-discharge rate. Therefore you
can also charge batteries with a partial charge in them, without the need of discharging the pack before. Partially
charged packs can be stored over a long period of time, without getting damaged. Please also see the „Storage“
section for further reference.
Car / Flight
PowerPaCks
Balancing-port 3-pole (7.4V packs)
Black (Battery-Negative)
Cell 1-
Brown (cell connection)
Cell 1+ (Cell 2-)
Red (Battery-Positive)
Cell 2+
Balancing-port 4-pole (11.1V packs)
Black (Battery-Negative)
Cell 1-
Brown (cell connection 1)
Cell 1+ (Cell 2-)
Blue (cell connection 2)
Cell 2+ (Cell 3-)
Red (Battery-Positive)
Cell 3+
Balancing-port 5-pole (14.8V packs)
Black (Battery-Negative)
Cell 1-
Brown (cell connection 1)
Cell 1+ (Cell 2-)
Blue (cell connection 2)
Cell 2+ (Cell 3-)
Green (cell connection 3)
Cell 3+ (Cell 4-)
Red (Battery-Positive)
Cell 4+
Balancing-port „x-treme Race“ (7.4V packs)
4mm gold plug socket (battery -)
Cell 1-
2mm gold plug socket (cell conn.)
Cell 1+ (Cell 2-)
4mm gold plug socket (b)
Cell 2+
Power-wires incl. plugs
Red
Battery-Po
Black
Battery-Negative -
e.g. balancing-port 3-pole
e.g. balancing-port 4-pole
Po
we
r-w
ire
s
Po
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er
-w
ire
s
Cell configuration
max. charge current
max. charging voltage
NOSRAM VTEC LiPo - 7.4V - 2S (all types)
1C*
8.40V
NOSRAM VTEC LiPo - 11.1V - 3S (all types)
1C*
12.60V
NOSRAM VTEC LiPo - 14.8V - 4S (all types)
1C*
16.80V
* C=Nominal capacity of the battery. E.g. with a nominal capacity of 2300mAh (2.3Ah), the battery can be charged with a max. current of 2.3A.
25C
lithiumPolymer:
high CaPaCity
high Power
