inputs.text: great kindle fire - browsing accessories kindle fire stumbled imp50d almost bought saw imp70d not much money imp70d little bigger higher capacity 21a port appropriate fire powerhungry devices ports provided ideal use fire charge unit via microusb port use charger already fire microusb cable use provided cable microusb cable probably already bought fire charge fire whose devices not already use microusb cables chargers common pick one suits needs like little wallwartwithusbport chargers since work basically anything one supplied usb cable get imp70d charged second port available charge phone time nice plus usb cable supplied functional nothing else really not ideal since coiled not long not really let use device charging length makes tough use charge imp70d people might appreciate compact convenience two cables one able charge fire 10 full less 4 hours took imp70ds capacity half measured status leds using app called \\battery monitor widget\\ seen current going charge battery varying 725ma use 1900ma sleeping not exact method seehems 21a port definitely put rated current reviewers disappointed usable capacity power packs count many full charges devices get based individual battery capacities keep mind output circuitry power pack charging circuitry device take power no perfect transfer power one battery bit confused need turn battery pack \\on\\ expected always ready supply power anytime plugged something connecting device push button start charging turn automatically unplug device presumably current draw drops low enough since cannot see unit \\on\\ may surprised not charge device one downside not appear output power charging would convenient physically unit lighter weight expected good shape not really match devices kind odd still fit pocket pretty portable cannot tell pictures glossy would prefer matte finish would not show scratches fingerprints status leds handy really hard interpret glance bright close together short want extend fires battery life least one full charge imp70d handle let charge cell phone time bonus need figure good way carry along fire