From some recent advertising from Donner, saw the Vowel and enquierd if it could also took a battery, It was a 'NO' to the battery, but Donner kindly sent one for me to give a try   Form-Factor is great, love the smaller size, would take up loads less space on a pedal board, no issue in using it, might get lost under the platform boots of a 70’S Glam Rock Revival Band!   Twin LED’s glow Green Vol / Red Wah but are mainly unseen under ya foot when using it at home. Might get a