User's Manual

48
Installation notices
for example, NiMH batteries. LiPo batteries are also
available in hard plastic casings to protect them from
mechanical damage.
The comparatively high nominal voltage, 7.4 V, for a
2-cell LiPo pack does not present a problem for either
Gr
aupner HoTT receivers nor for those servos, speed
controllers, gyros and other devices which have been
specifi cally approved for operation in this – higher –
voltage range. Please note however that practically
all servos, speed controllers, gyros and other
devices built in the past and most such devices
currently still offered on the market have only a
permissible voltage range of 4.8 to 6 V. Use of these
batteries in conjunction with these devices demand use
of a stabilized voltage regulator, e. g. the PRX, Order
No. 4136, see appendix. Otherwise there is danger that
attached devices will incur damage within a short period
of time.