Introduction - GRAUPNER 6444 Allgemeine Einführung

A-1. INTRODUCTION
Please study these instructions, reading them completely and attentively, before using the unit for
the first time. This will guarantee that you will be able to exploit all the facilities of your new
battery charger. The warnings and safety notes are particularly important. Please store these
instructions in a safe place, and be sure to pass them on to the new owner if you ever dispose of
the charger.
In the ULTRA DUO PLUS 50 you have acquired a mature product with an excellent performance. It
incorporates the latest semi-conductor technology, controlled by a high-performance RISC micro-
processor, to provide superior charging characteristics combined with simple operation and optimum
reliability. These features can normally be expected only from much more expensive units. The ULTRA
DUO PLUS 50 represents a reliable method of charging sintered Nickel-Cadmium (NC, Ni-Cd) packs,
Nickel-Metal-Hydride (Ni-MH) batteries, Lithium-Polymer (Li-Po), Lithium-Manganese (Li-Mn), Lithium-Ion
(Li-Io) and LiFePO 4 (LiFe) batteries, and also lead-gel and lead-acid (Plumbum: Pb) batteries These
sealed, gas-tight batteries have proved excellent for our purposes in RC models. They are mechanically
robust, can be used in any attitude and are generally highly reliable. They require no special measures for
storage apart from protecting the cells from becoming deep-discharged. The ULTRA DUO PLUS 50 can
also be used to discharge your batteries and balance the cells in a pack.
Note
It is important always to observe the charging instructions supplied by the battery manufacturer, and to
keep to the recommended charge currents and times Do not fast-charge batteries unless the
manufacturer states expressly that they are suitable for the high currents which flow during these
processes. When charging new batteries you may also encounter problems with premature charge
termination. Whenever you wish to use a new battery it therefore makes sense to carry out a series of
monitored test charges, so that you can check that the automatic charge termination circuit works
correctly and reliably with your packs, and charges them to full capacity.
Accessories
Order No. 6444.6 Battery holder for up to seven sub-C cells with individual cell terminals for side-by-
side soldered battery packs, as generally used in competition. Required for balancing cells, e.g. Order
No. 98947.6XXL
Replacement parts
Order No. Description
6444.1 Temperature sensor for sub-C batteries, with magnet
.2 Temperature sensor without magnet, e.g. for tyre heating covers
.USB Mini-USB / PC-USB interface cable
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