Review: Super Mini Booster - Portable Emergency Power Pack

I am encouraged by the EO response from Adele - money back guarantee if not satisfied - can't argue with that, although I am a bit skeptical about the purported photo in the advert - as DiscoRosco mentioned - it is bigger than it looks. So checking the dimensions that would seem the case - far bigger than it appears here. Perhaps EO can produce a real life pic for us?
I have used jump packs for years as a backup for my vehicles - initially a 600ah job, until that wouldn't crank my son's 4.2 Patrol, so upgraded to the 1900 ah and hasn't let me down yet - but it is fairly bulky & heavy & showing it's age.
I would appreciate it if we could see this in a true comparison to hand size - at 23cm the picture above appears to me to be totally out of proportion - either that or someone has an awfully big mitt?
Regards - Phil