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Notes on the use of NC batteries
Application
All Graupner NC battery packs and single cells are designed exclusively for typical
modelling applications in model aircraft, boats and cars.
Charging
1. NC batteries must always be charged using a suitable standard charger or fast
charger. For more information see the main Graupner FS catalogue.
2. Before charging an NC pack, allow it to cool down to ambient temperature, i.e. approx.
20º C. If you are impatient, use the BATTERY COOLER, Order No. 2882.
3. The battery should not be charged until just before use, as all NC cells have a natural
tendency to self-discharge due to their construction
4. Warning:
The charge process must be supervised even if you are using a fully automatic
charger. Note the maximum permissible charge current printed on the pack or
individual cells, and do not exceed that value. Excessive charge currents can cause
NC cells to overheat. If the battery heats up to about 50° C when on charge, the
charge current must be switched off immediately. When NC cells get hot, the pressure
inside the cell case rises greatly. Every NC cell in a pack is fitted with a pressure valve
which is designed to prevent it exploding dangerously in an emergency. However, the
valves may be blocked or malfunction for some other reason, which means that an
explosion is always possible if the cell overheats seriously.
5. Warning:
If you overcharge an NC pack accidentally, do not touch it! Switch off the charge
current and allow the pack to cool down naturally.
6. Warning:
It is essential to avoid short-circuits involving NC packs. The result is an extremely
high rate of discharge which heats up the battery immediately, and this can cause
cells to burst in the same way as an overheated pack. The explosion itself represents
a serious risk of injury, and any corrosive electrolyte which escapes from the cell can
cause chemical burns.
If electrolyte escapes from a cell, take great care to avoid it getting on your skin or in
your eyes. If this should happen, rinse immediately with copious quantities of water
and seek medical assistance.
7. Never solder a wire or anything else directly to the cell case, as this may damage the
pressure valve.
8. Warning:
Never dispose of faulty or exhausted NC batteries in a fire, as they may explode. Don't
discard them in the household rubbish, as they constitute toxic waste and require
special treatment. Take them to your local toxic waste collection point (ask your local
council for details). It costs nothing to dispose of exhausted cells properly, and helps
preserve a clean environment, as most of the materials can be recycled.
IMPORTANT: when the flight battery is exhausted, you must not dispose of it in the
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household waste. Take the pack to your local battery reclamation centre.
IMPORTANT: when the useful life of the model and the transmitter are over, do not
discard them in the domestic rubbish. The electric and electronic components in
particular must be taken to your nearest electrical recycling centre. Ask your local
authority if you are not sure of its location.
GRAUPNER GmbH & Co. KG
We reserve the right to introduce modifications. No liability for printing errors.
D-73230 KIRCHHEIM-TECK
4
GERMANY
05/2006
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