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Chapter III: S9 III standard accessories
Fig. 3.4 - S9III internal case of Rover
III.2 Power supply
Batteries
The standard configuration contains two batteries, a slot for charging batteries (named
“charger” for simplicity) and an adaptor. The battery are “lithium-ion” battery (7.4 V - 2500
mAH): a technology which has an higher energy-to-weight ratio with respect to NiCd or NiMh
batteries, no memory effect, and slow self-discharge when not in use.