Using external powerbank, problems

[zalle]

Hello guys,

I need to use the A7ii for video, and the batteries are very very weak.

I bought a dummy battery, with 2 USB plugs, which I want to plug in to powerbanks, or external battery units.

I tried with a powerbank which I had lying around, with the following specs:

Capacity: 3000mah - battery is 1020mah

Output: 800mah 5v - battry is 7.2v... IS THIS A PROBLEM?

I tried and it works, I recorded several videos, but a couple of times the camera switched off. PANIC!

It looks like it switches off when I move the camera around, but it is not a question of bad contacts, I tested everything. Could it be the low quality of the powerbank? This powerbank is a cheap one.

I also thought of using NP-F sony batteries, with an adapter. Is this a good idea?

Thanks for any help.

 

[adwb]

I have not bought yet but I  was was thinking to get this http://www.exprodirect.com/ex-pro-sony-on-the-move-7600mah-rechargeable-battery-power-system-replacing-battery-grip-np-fw50-dr-fw50-battery-for-sony-dslr-cameras.html

perhaps their battery specs might help you?

Edited February 18, 2019 by adwb

[VTC]

For me the USB port for power is useless since I use that port to trigger record or zoom when rigged up. 

I have a base that uses NP battery connected to a dummy battery in the camera. I cut the provided cord short and hard wired the cable for when it's rig mounted where the power is close to the camera. Quickly disconnected if need be.

If I'm running an external monitor/recorder I hook to the base with a different connection I made from a dead battery. If I don't have the camera in a rig I can still use the external power supply by running it off the extension. Sometimes the battery's in my pocket. Sometimes its Velcroed to my wrist.

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