Linking power banks and ports

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ZoomieFan
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Joined: 08/19/2016 - 05:25
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Linking power banks and ports

Imagine a situation when you need 50,000 mAh, but you only have 2× 30,000 mAh power banks (PB), to power a single device.
One way to handle that, is by connecting your device to PB-1 while it’s being charged by PB-2.
That works, but I think at the cost of extra conversion losses.

Can I safely use an Y-cable to draw juice from both PBs at the same time to power the device?
I think I safely can, but there may be certain (smaller) things I overlook.

If so the capacity doubled, without needless conversion losses.
Because the load per PB is lower the efficiency of both PB’s goes up.
Assuming the Y-cable can handle the load, the maximum amps that can be drawn doubles too.

That brings me to my last question. Yesterday I was reading this review and the major drawback of that powerbank is the max output per port is only 2A. I often need a little extra.
Can I safely link 2 ports on the same PB with an Y-cable to boost the maximum output?

Chargers: 1xBasen BD01 5/5, 1x Gyrfalcon All-88 4/5, LiitoKala: 3x100 3/5, 2x202 3/5, 1x402 3/5., MiBoxer C4-12 3/5.
Flashlights: DQG Tiny III 26650 5/5, DQG Tiny III 18650 5/5
FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Skillhunt H04FRC 4/5, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: Romoss 30000 4/5, xiomi 1000 4/5, Xtar PB2 4/5, Xtar PB2S 5/5

angerdan
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Joined: 11/01/2015 - 10:07
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ZoomieFan wrote:

  1. Can I safely use an Y-cable to draw juice from both PBs at the same time to power the device?
  2. Can I safely link 2 ports on the same PB with an Y-cable to boost the maximum output?
Yes.

Good cables are these:
delock.de/produkte/G_763_Y-Strom—und-Datenkabel.html?setLanguage=en
startech.com/Cables/USB-2.0/Micro/3foot-USB-Y-Cable-for-External-Hard-Drive-Dual-USB-A-to-Micro-B~USB2HAUBY3