my husband has COPD and has to take with him a small cylinder of o2 which has a pulser and is carried on the back like a back pack but it is so blumming heavy he cannot carry it
and we saw a guy on hols in Devon with a really discrete handbag size bag small and really light weight 5lb in wight lst 3 hours on battery time but is hidden under your coat any one know about this please thankyou so much x