[. . . ] - Don't subject the charger to direct sunshine, and do not cover it. - Do not charge batteries which are already hot; allow them to cool down to ambient temperature before recharging. - Use only packs of fast-charge cells which have been properly balanced (equal state of charge). [. . . ] 15 V DC 12 V lead-acid battery or a powerful well stabilised mains PSU (do not use a car battery charger!Connect the crocodile clips to a 12 V lead-acid battery or a suitable mains PSU; take great care over correct polarity (red = positive / black = negative). the LCD screen will show "AUSWAHL MODUS / AUTOMAT/MANUELL" or "MODE SELECT / AUTOMATIC/MANUAL". Selecting the language: To change the language hold the ENTER button pressed in while you connect the power supply; a Language Select menu will appear. You can switch between DEUTSCH (German) and ENGLISH by pressing the - or + button. connect the battery charge leads to the OUTPUT sockets (red = positive / black = negative). If you press the MODE button repeatedly you can switch between CHARGE, DISCHARGE and DISC/CHAR for NICD and CHARGE START NIMH packs separately. Select the desired spot memory with the "+" or "-" button. If necessary change mode to CHARGE or DISCHARGE and DISC-CHAR using the Mode button. General information about charging and discharging batteries As a basic rule please be sure to observe the battery manufacturer's recommendations, especially the information regarding maximum charge currents. To ensure that the automatic Delta Peak circuit is able to work as efficiently as possible, only properly balanced packs should be fast-charged. This means that new packs, and packs which have not been used for a long time, should be discharged at regular intervals and re-balanced by slow-charging at a low rate, typically C/10. an occasional complete discharge process also helps to avoid and/or eliminate the MEMORY EFFECT. Fairly old batteries, and packs of certain relatively low-quality cells, may prevent the automatic current setting function working properly in automatic mode. [. . . ] Fairly old batteries, and packs of certain relatively low-quality cells, may prevent the automatic current setting function working properly in automatic mode. Charging and discharging a transmitter battery which is installed in the RC system transmitter is only possible if you either by-pass the protective diode in the transmitter's charge circuit, or remove the battery from the transmitter and connect it to the charger using a direct charge lead. Conversion work on the transmitter should only be carried out by an expert, ideally by your nearest robbe Service Centre. [. . . ]