1. CONNECTION
3. DISCHARGING
5. STORAGE
4. SPECIAL NOTES FOR HANDLING
2. CHARGING
6. INTERESTING FACTS ABOUT LIPO BATTERIES
USER GUIDE
All LRP LiPo Power/Hyper Packs come with properly sized power-wires incl. plugs. These power connec-
tions 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 LRP LiPo Power/Hyper Packs are equipped with a so-called
EHR-Balancing-port. This EHR-Balancing-port can be used to condition and equalize the individual cells
inside a battery pack.
Special balancers or certain chargers use this balancing port to perfectly condition and equalize the indi-
vidual 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.
For perfect conditioning of your LRP LiPo Power/Hyper Packs, we recommend the use of our LRP LiPo Par-
allel Precision Balancer (No. 45200). For best possible performance and safety, always use this balancer
when charging your LiPo battery.
BALANCING-PoRt PIN ASSIGNMeNt:
All LRP LiPo Power/Hyper Packs are capable of a maximum peak discharge current of 40C. The continous
discharge current for all LRP LiPo Power/Hyper Packs is 25C.
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).
LRP LiPo Power/Hyper Packs do not have a memory effect and only a very low self-discharge rate. There-
fore 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 char-
ged. 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 LRP LiPo Power/Hyper Pack for a
very long time.
• Avoid short-circuits! Short-circuiting the battery results in very high currents, which damage the inter
-
nal 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 protected 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.
All LRP LiPo Power/Hyper Packs 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 bat-
tery 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 char-
gers do not reduce the charging current and therefore ultimately lead to overcharging the battery!
LRP LiPo Power/Hyper Packs do not heat up during charging. It is normal, that the battery still has ambient
temperature 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 LRP LiPo Power/Hyper Packs consist of multiple LiPo-cells.
You can see the max. charging voltage in the table below. We advise the following settings for charging
our LRP LiPo Power/Hyper Packs:
PLeASe Note: You can use your LRP LiPo Power/Hyper Pack several times a day. However be sure, that
the battery has completely cooled down to ambient temperature, before re-charging it again.
LRP LiPo Power/Hyper Packs do not have a memory effect and only a very low self-discharge rate. There-
fore 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.
Balancing-port 3-pole (7.4V packs)
Black (Battery-Negative)
Cell 1-
Brown (cell connection)
Cell 1+ (Cell 2-)
Red (Battery-Positive)
Cell 2+
Cell configuration
max. charge current max. charging voltage
LRP LiPo Power/Hyper Packs - 7.4V - 2S (all types)
1C*
8.40V
Power-wires incl. plugs
Red
Battery-Po
Black
Battery-Negative -
© LRP electronic GmbH 2009
AA00574
LRP electronic GmbH
Wilhelm-Enssle-Str. 132-134
73630 Remshalden
Germany
www.LRP.cc
Dear Customer,
thank you for your trust in this LRP product. By purchasing a LRP LiPo PoWeR/HYPeR PACK 7.4V - 25C -
Stickpack Hardcase, 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 LRP LiPo Power/Hyper Pack for the first time and to ensure that your LRP LiPo Power/
Hyper Pack 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 LRP LiPo Power/Hyper Pack better. Please
take your time as you will have much more joy with your LRP LiPo Power/Hyper Pack 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.
* 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.
• 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. Therefore 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 nomi
-
nal capacity. With this, LiPo batteries will have the max. possible cycle life. Real-Life application sho-
wed, 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.
25C
LITHIUmPOLymER POwER:
HIGH CAPACITy / HIGH POwER
LRP LiPo POwER/HyPER PACKS
7.4V - 25C - STICKPACK HARDCASE
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