Linnenberg Telemann Owner's Manual page 23

(Figure 5)
Battery change
The remote control supplied with the TELEMANN
is equipped with a Lithium battery CR2032.
Battery life is usually more than a year, probably
much longer. For replacing the battery one
needs to dismantle the assembly. 4x bolts on
the outside and 6x bolts in the inside have to be
unscrewed before the remote PCB is accessible.
The actual battery is fixed in a holder.
(Figure 6)
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