At a glance Expert’s RatingProsPowerfulPortableUp to 9 hours of use between chargesFolds into standing modeCons5-hour charging timeNo way to attach it to a bagOur VerdictWith a couple of minor tweaks, this fan would be perfect. As it is, it’s powerful, long-lasting, cleverly designed and excellent value. For a very small investment, you can be comfortable everywhere you go for the rest of the summer. Summer has been a mixed bag, veering wildly between grey and blazing days. But the sunny days have been a showcase for how poorly the UK is adapted to very hot weather. Unlike those in other count…