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• Liquids leaking from batteries/rechargeable batteries are chemically highly aggressive. Objects or sur-
faces that come into contact with them may take severe damage. Therefore, keep batteries/recharge-
able batteries in a suitable location.
• Neverrechargenormal(non-rechargeable)batteries.Thereisariskofreandexplosion!Chargeonly
rechargeable batteries intended for this; use suitable chargers.
• Always observe correct polarity of batteries/rechargeable batteries and the connection of a rechargeable
drive battery (note plus/+ and minus/-) when inserting the batteries.
• Never mix batteries and rechargeable batteries! Use batteries or rechargeable batteries, e.g. for the
transmitter.
• Always replace the entire set of batteries or rechargeable batteries in the transmitter. Never mix fully
charged batteries/rechargeable batteries with partially discharged ones. Always use batteries or re-
chargeable batteries of the same type and manufacturer.
• A battery charger corresponding to battery technology (NiMH, LiPo....) is required. Never leave, e.g.,
LiPobatteriesunattendedinanNiMHcharger!Thereisariskofreandexplosion!
• A suitable balancer is required for charging multi-cell LiPo batteries (usually integrated in good LiPo
chargers). A balancer (frequently also referred to as an equalizer) prevents overcharging of a single LiPo
cell by inspection of the individual cell voltages.
WhenoverchargingaLiPocell(max.cellvoltage4.24V),theLiPobatterymaybloatorevencatchre
or explode!
• Only charge intact and undamaged batteries. If the outer isolation of the rechargeable battery or battery
housing is damaged or the battery is deformed or bloated, it must not be charged. In this case, there is
immediatedangerofreandexplosion!
• Neverchargethebatteryrightafteruse.Alwaysleavetherechargeablebatteriestocooloffrst(atleast
5 - 10 minutes).
• Remove the battery from the model for recharging.
• Neverplacethechargerandrechargeablebatteryonaheat-resistant,inammablesurface.
• Charger and rechargeable batteries heat up when charging. Leave enough distance between the charg-
er and the rechargeable battery, never place the rechargeable battery on the charger. Never cover the
charger and the battery. Do not expose the charger and rechargeable battery to any high/low tempera-
tures or to direct solar radiation.
• Never leave batteries unattended while charging them.
• Regularly recharge the rechargeable batteries (about every 2 - 3 months). Otherwise, self-discharge of
the batteries may cause deep discharge. This renders the rechargeable batteries useless!
NiMHbatteries(exceptforspecicbuildswithlowself-discharge)losetheirenergyevenwithinafew
weeks.
LiPo batteries usually retain their energy for several months; however, they are damaged permanently
by deep discharge and cannot be used anymore.
• Never use a too-high charging current. Observe the manufacturer information on ideal or maximum
charging currents.
• Remove the battery from the charger when it is fully charged.
• Chargers and rechargeable batteries must not get damp or wet. There is a danger to life from electric
shock;therealsoisadangerofreandexplosionfromtherechargeablebattery!
Rechargeable batteries with lithium technology (e.g. LiPo batteries) in particular are very susceptible to
moisture due to the chemicals they contain!