inputs.text: imp70d - imp70d great little device charge 2 separate device time one low power device charging 1 amps one higher power consumption charging 21 amps max tested load output matched specifications two things note 1 manual says power light go 60 sec goes 5 sec personally not like power light going conserve power 2 cannot manually turn power power turns approximately 30 sec remove connector unit charging completed charge time 2200 mahr device 345 many people not understand need usb portable power supply important device personally not like phone mp3 player battery operated digital device get 35 battery charge reason actual voltage drops unit draw amperage sustain device amperage hotter device going run people think handheld device hotter run long time fact amps flowing device example use mp3 player 2200 mahr battery no heavy load watching video shutdown 20 35 vdc battery charge voltage dc amperage run time 100 41 440 0 85 39 500 045 75 385 520 130 65 38 540 145 50 37 560 215 25 36 580 315 normal shutoff devices higher poer draw 1820 15 348 610 345 12 34 640 355 10 332 650 415 personally not like voltage go 37 recharge around 4045 50 charge battery life drops faster carry usb power supply charge devices 5035 devices run cooler andhave longer life