How to safely shut down or force shut down Archos devices

Archos 50d Neon Archos 50d Neon
Archos 80d Xenon Archos 80d Xenon
Archos 70 Xenon Color Archos 70 Xenon Color
Archos 45b Neon Archos 45b Neon
Archos 50 Platinum 4G Archos 50 Platinum 4G
Archos 45d Platinum Archos 45d Platinum
Archos 50e Neon Archos 50e Neon
Archos 55b Platinum Archos 55b Platinum
Archos 50 Titanium 4G Archos 50 Titanium 4G
Archos 55 Helium 4 Seasons Archos 55 Helium 4 Seasons
Archos 55 Helium Ultra Archos 55 Helium Ultra
Archos 50f Helium Archos 50f Helium
Archos 50f Helium Lite Archos 50f Helium Lite
Archos 55 Helium Archos 55 Helium
Archos 55 Diamond Selfie Archos 55 Diamond Selfie
Archos 55 Diamond Selfie Lite Archos 55 Diamond Selfie Lite
Archos 133 Oxygen Archos 133 Oxygen
Archos 97c Platinum Archos 97c Platinum
Archos 70 Platinum 3G Archos 70 Platinum 3G
Archos 101b Helium Archos 101b Helium