repair procedures /
limited warranty
4. special notes for handling
5. storage
6. interesting facts about lipo batteries
All products from NOSRAM are manufactured according to the highest quality standards. NOSRAM
guarantees this product to be free from defects in materials or workmanship for 90 days (non-euro-
pean countries only) from the original date of purchase verified by sales receipt. This limited warran-
ty doesn’t cover defects, which are a result of misuse, improper maintenance, outside interference
or mechanical damage. This especially applies on already used batteries or batteries, which show
signs of heavy usage. Damages or output losses due to improper handling and/or overload are not a
product fault. Signs of wear (loss of capacity) after intensive usage are also no product fault.
To eliminate all other possibilities or improper handling, first check all other components in your model
and the trouble shooting guide, if available, before you send in this product for repair. If products
are sent in for repair, which do operate perfectly, we have to charge a service fee according to our
pricelist.
With sending in this product, the customer has to advise NOSRAM if the product should be repaired
in either case. If there is neither a warranty nor guarantee claim, the inspection of the product and
the repairs, if necessary, in either case will be charged with a fee at the customers expense accor-
ding to our price list. A proof of purchase including date of purchase needs to be included. Otherwise,
no warranty can be granted. For quick repair- and return service, add your address and detailed
description of the malfunction.
If NOSRAM no longer manufactures a returned defective product and we are unable to service it, we
shall provide you with a product that has at least the same value from one of the successor series.
The specifications like weight, size and others should be seen as guide values. Due to ongoing tech-
nical improvements, which are done in the interest of the product, NOSRAM does not take any
responsibility for the accuracy of these specs.
NOSRAM-Distributor-Service:
• Package your product carefully and include sales receipt and detailed description of malfunction.
• Send parcel to your national NOSRAM distributor.
• Distributor repairs or exchanges the product.
• Shipment back to you usually by COD (cash on delivery), but this is subject to your national
NOSRAM distributor‘s general policy.
• 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.
• 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.
NOSRAM VTEC X-treme Race Hardcase 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 no-
minal capacity. Therefore fully discharge the battery pack and then partially charge it with a charge
current of 1C for 30 minutes or charge it up to a voltage of 3.85-3.90V/cell. In this condition, the bat-
tery 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 X-treme Race
Hardcase Lipo batteries 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. 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
nominal capacity. With this, LiPo batteries will have the max. possible cycle life. Real-Life applica-
tion 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.
