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Hi, Has anyone had any experience using portable car jump starter power bank’s as an external battery for their location sound equipment? I’m looking for a budget external battery for my basic boom and lav kit and have come across these. It seems to have a good capacity, output’s 12v, fairly light weight and be very affordable compared to NP1 solutions. Or am I missing something? Here are some example’s of the product: http://www.ebay.com/itm/68800mAh-4USB-Multi-Function-Car-Jump-Starter-Power-Bank-Rechargable-Battery-12V-/371500798517?hash=item567f2c5235:g:AYoAAOSw2GlXKWrt&item=371500798517&vxp=mtr http://www.ebay.com/itm/68800mAh-4USB-Car-Jump-Starter-Emergency-Charger-Booster-Power-Bank-Battery-SOS-/381494287043?hash=item58d2d4dac3:g:SEIAAOSwKfVXFY4s&item=381494287043&vxp=mtr http://www.amazon.com/T-Face-Multi-Function-68800mAh-Starter-Charger/dp/B01DITJA64/ref=sr_1_1?ie=UTF8&qid=1463578981&sr=8-1&keywords=jump+starter+power+bank+68800 http://www.amazon.com/Starter-Portable-20000mAh-Multi-Function-20000MAH/dp/B013I9KPOU/ref=sr_1_13?ie=UTF8&qid=1463578909&sr=8-13&keywords=jump+starter+power+bank Regards, Luke

I have a hypothetical/theoretical question about timecode. I am not asking for any practical reason, and I have no timecode enabled equipment to test this on myself. Just a curiosity. I'm pretty sure I understand the differences between timecode and genlock/sync, namely, that timecode alone does not force synchronised recording speeds between devices, it only stamps synchronised time numbers over the top of the recordings. EG, I am aware that if one jam-syncs the timecode of multiple devices at the start of shooting, then disconnects the timecode cables, after a while, the timecodes (and thus, the recordings themselves) can/will drift out of sync. But what happens when the timecode (NO genlock) is constantly being fed, not a single jam-sync? Say, for example, you have a single audio recorder and a single camera. The audio recorder is sending timecode to the camera constantly via cable. What happens when the camera 'tries' to drift out of sync? The timecodes cannot drift out of sync (as they would if only jam-synced at the start of shooting), as that is the whole point of having constantly connected timecode cables, right? But at the same time, timecode alone will not force the recordings to sync? So...? I have been reading up online about this, and different websites seem to imply two different possibilities: A) the recording of the slave device (the single camera, in my above scenario) will simply drift out of sync from the master (the single audio recorder, in my above scenario), even though the timecodes remain the same throughout the recordings. Or as the slave recording 'tries' to go out of sync by a full frame, it 'tries' to take the timecode with it, but it cannot, so it 'jump' corrects itself. EG, as the camera 'tries' to run 1 frame slower than the timecode it is being fed, it forcibly corrects itself by adding a frame (and/or the opposite, of course). I have come across references to 'green flashes' in footage as a result of a slave camera 'trying' to drift from its incoming timecode. I guess these green flashes are the result of the camera 'adding' a frame (of green?) to force correct itself to match the incoming timecode? Or something else entirely?