6. DISCHARGING
5. CHARGING
REPAIR PROCEDURES /
LIMITED WARRANTY
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 countris only) from the original date of purchase verified by sales receipt. This limited warranty
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. The following points do also result in a service fee:
• Original power plugs replaced with a NON reverse polarity protected power plug system.
• Send in the battery without power plugs.
• Removed or damaged original heatshrink.
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.
All NOSRAM VTEC LiPo-batteries can be charged with a maximum current of 1C* (0.8C* for RX/TX-
packs). For charging, only use chargers, which are specially designed and developed for LiPo-bat-
teries. 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.
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 temperature when it is fully charged. If the battery heats up during charging or warps,
immediately stop charging it.
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 cur-
rent 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.
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 dischar-
ging 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.
We recommend the following settings for charging our NOSRAM VTEC LiPo-batteries:
Cell configuration
max. charge current
max. charging voltage
LiPo Pack - 7.4V - 2S
1C*
8.40V
LiPo Pack - 7.4V - 2S - RX-only
0.8C*
8.40V
LiPo Pack - 11.1V - 3S
1C*
12.60V
LiPo Pack - 11.1V - 3S - TX-only
0.8C*
12.60V
LiPo Pack - 14.8V - 4S
1C*
16.80V
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.
* C=Nominal capacity of the battery. E.g. with a nominal capacity of 3300mAh (3.3Ah), the battery
can be charged with a max. current of 3.3A.
All NOSRAM VTEC LiPo-batteries (except the RX/TX-packs) are capable of a maximum peak discharge
current of 25C. The special manufacturing technology of the NOSRAM VTEC LiPo-batteries make
these high discharge currents possible.
The
continous
discharge current for all NOSRAM VTEC LiPo-batteries (except the RX/TX-packs)
is 15C.
Please note:
RX-/TX-only packs can only be used for the typical application as receiver (RX-only) or
transmitter (TX-only) pack. They are not suited for high discharge currents!
You have to take care, that the batteries do not get deep discharged.
As soon as the battery volta-
ge falls below 2.80V per single cell, the battery pack gets damaged irrevocably.
With 2S packs, the discharge cut-off voltage is 5.6V, with 3S packs it is 8.4V and with 4S packs
the discharge cut-off voltage is 11.2V. 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 60°C
(140°F).