inputs.text: job caveats - bought portable battery pack keep phone juiced throughout couple long conferences easypak holds enough charge 45 complete refills phone battery physical size phone galaxy s2 makes fairly easy handling even charging pleased products performance exactly dobut not perfect led battery level indicators could use recalibration charging typically stops 2 4 lights still showing green little misleading times also keep wondering long builtin micro usb plug going last given often use bundled next phone extrehemely short cable tends twist imagine straining poor cable breaking pointon upside use external micro usb cable provided usb ports happens still niggling concernso solid product gets lot use couple annoying flaws great buy price overall