it can not charge my Galaxy Tab tablet nor my Blackberry 9700 handphone , not even connect one device only at one time to either socket . however it can charge my blue tooth earphone which use very low power . update -lrb- sep 25 , 2011 -rrb- test today with ipad2 , it can charge the ipad2 and bluetooth earphone simutaneously no matter which socket they be plug . still can not charge the BB 9700 , not test again the Galaxy tab as not carry the cable . as I doubt there might be set in the Galaxy tab and bb 9700 make they could not be charge , I would like to change the rating to 4 star .