Powerbanks tested with DHO800/900

[Houseman]

Anker 737  24,000mAh (powercore 24k) FAILED !

It is a shame if your Anker737 dont work with your Rigol, as the Anker737 (Powercore24 A1289) does seem to work with the newer Rigol products, but it could be they changed something from the older Rigol products to the newer Rigol models.

I can CONFIRM that even if new generation IT DOES NOT WORK with RIGOL DHO914.
Even 140W Seires 7 Generation 2 these beefy PB does freeze the Rigol at startup since cannot go beyond 20W. EITHER plugged in C1 and in C2 jacks. See attach
DO NOT BUY IT.

I am asking before claiming for refund if Anker will release a new firmware for this item...

[DaneLaw]

Anker 737  24,000mAh (powercore 24k) FAILED !

It is a shame if your Anker737 dont work with your Rigol, as the Anker737 (Powercore24 A1289) does seem to work with the newer Rigol products, but it could be they changed something from the older Rigol products to the newer Rigol models.

I can CONFIRM that even if new generation IT DOES NOT WORK with RIGOL DHO914.
Even 140W Seires 7 Generation 2 these beefy PB does freeze the Rigol at startup since cannot go beyond 20W. EITHER plugged in C1 and in C2 jacks. See attach
DO NOT BUY IT.

I am asking before claiming for refund if Anker will release a new firmware for this item...

Not sure what Rigol had in mind with their DHOxxx line, and could look like they placed themself between two chairs 12V PD & 15V PD
As mentioned newer products from Rigol, using the same form factor, works on all the high current powerbanks I got access to.
An example of the start-up cycle stays constantly in 15v PD.

You can obviously decoy trigger a locked 15V PD, then it should work according to the info on page1.
What I do with my Micsig scope that doesnt have native PD, so can use most of these PD powerbanks with that unit.

[Proxy64]

@Houseman you can use a board like this one, to trig 15V/3A
Maybe there is version with USB-C male to USB-C female, I don’t know.

And you know, I don’t think Anker is guilty in this case with the Rigol DHO800/900



https://www.aliexpress.com/item/1005006445099579.html?spm=a2g0o.productlist.main.3.6e495d53bv2LjW&algo_pvid=3a6a6fd9-8e3f-4010-960e-0ff2517fb9c0&algo_exp_id=3a6a6fd9-8e3f-4010-960e-0ff2517fb9c0-1&pdp_npi=4%40dis%21THB%21120.29%2136.07%21%21%2123.38%217.01%21%402103297517078804100556610e3c2e%2112000037191871056%21sea%21TH%21121161211%21&curPageLogUid=oWh0sN5vfrCx&utparam-url=scene%3Asearch%7Cquery_from%3A

[Proxy64]

Here a test with a PD trigger board to use an Anker powerbank to power a DHO800/900.

https://youtu.be/CBg0HLug-W4?si=Qaa56oDNEBTkxZSL

edit: Note that the FNB58 is only here to display the voltage and power.

[Proxy64]

Based on to this video Shargeek Storm2 works
https://youtu.be/TXL916et9_Y?si=ufldtgFa_a2auhS4

[Houseman]

Thank You all. Would like to know a way to measure how much noise in injected into the rigol via power supply with this setup.
And why the power supply provides 12V instead of 15V provided by the powerbank

[ebastler]

And why the power supply provides 12V instead of 15V provided by the powerbank

Where "the power supply" means which power supply??

Only the very early power supplies shipped with beta units (and maybe to early Chinese customers) were of the cheap fixed 12V type described in the user manual. All DHO800/900 scopes shipped to the Western world should come with proper supplies which negotiate the voltage via the USB PD protocol, and should negotiate 15V.

Rigol have just neglected to update the user manual. Or did you actually measure 12V being used with your scope's power supply?

[Demon Xanth]

Baesus 140W powerbank DOES NOT work works on the C2 output, but not the C1 input/output. Very curious.

Edit:
The C2 and USB-A outlets cut out due to lack of current, the C1 seems to have a handshaking issue. The 65W works fine though.

[shapirus]

This one works too:




The PSU here is a 69W Ugreen. The battery is a 3s LiPo.

Curiously, just like the Baseus mentioned in the previous post, it doesn't work (or the scope doesn't work) on port USB-C1. The other two, USB-C2 and type A, work fine.

update: I checked the specs, and now it's obvious: the specs state 20W max on port C1, 60W max on port C2. But then again, it says max 22.5W on port USB-A, and the scope works fine powered from that port.

[Houseman]

Nice!.
Isn't it a little bit undervoltage powered?
I see 11,1V instead of minimum 12V
How long does it last?
Regards

[Houseman]

Ah, ok got it now.
It is not just a cigar plug.
How long does it last?

[shapirus]

Ah, ok got it now.
It is not just a cigar plug.

But it is. It's a plain automotive 12V USB power supply designed for the cigarette lighter socket, only of the fancier ones -- higher power and with support of PD, QC and all the type C paraphernalia.

How long does it last?

Haven't measured. Will be equal to: battery energy capacity * DC/DC converter efficiency * wires and connectors loss factor / scope power. Very rougly, that's a 50 Wh battery, let's assume 80% conversion efficiency, then at 35 W consumption it's going to last 50 Wh * 0.8 / 35 W ~= 1.14 h.

Speaking of min voltage, it seems to work fine at (currently) ~11V, and there's really no reason for it not to: there's a plain switching buck-boost converter inside, and they typically have a wide range of acceptable input voltages. I will test it later with a lab PSU to see how low a voltage it can accept on the input.

[jsobell]

I can confirm that the INIU 25000mAh unit works fine - https://www.amazon.com.au/dp/B08VDJP7WN
I timed it, and it gives almost exactly two hours out of a 100% charge.
That's not overly impressive, as at 3A draw it mathematically should be over 7 hours, and even allowing for losses it would be nice to have more than 25% of the power delivered.
But, if two hours is sufficient, then this model works fine and is nice and cheap.
I've also ordered a 40,000mAh unit to test, and I'll post if it works or not.  It's a bit of a minefield choosing the packs, as some are only 5V, and many split their current over several ports, rather than a single one with 15V@3A as we require.

[shapirus]

I can confirm that the INIU 25000mAh unit works fine - https://www.amazon.com.au/dp/B08VDJP7WN
I timed it, and it gives almost exactly two hours out of a 100% charge.
That's not overly impressive, as at 3A draw it mathematically should be over 7 hours, and even allowing for losses it would be nice to have more than 25% of the power delivered.

No that's actually good enough. It's 25000 mAh at 3.7 V -- the usual disgusting trick of the powerbank manufacturers who don't specify capacity at the actual battery voltage, or, better, energy capacity. Always use energy -- measured in Wh -- to estimate the battery run time. This makes the battery 25 Ah * 3.7 V = ~92 Wh, and at 35 W power draw it theoretically means slightly over 2.6 hours. Apply the conversion losses and the chinese Ah derating, and 2 hours run time doesn't look bad at all.

[jsobell]

I confirm that powerbank INIU BI-B63 clamed as PD 100W 25000mAh does not complete Rigol's boot.
Fan goes on but after a while DHO shuts down.
Asked for refund.

Interesting, I have the same one and have no issues running the scope.
I can use it in either output socket (45W or 100W) and I get about 110mins out of a full charge.
The pack is rated to 3A@15V, which meets the requirements.

[jsobell]

I can confirm that the INIU 25000mAh unit works fine - https://www.amazon.com.au/dp/B08VDJP7WN
I timed it, and it gives almost exactly two hours out of a 100% charge.
That's not overly impressive, as at 3A draw it mathematically should be over 7 hours, and even allowing for losses it would be nice to have more than 25% of the power delivered.

No that's actually good enough. It's 25000 mAh at 3.7 V -- the usual disgusting trick of the powerbank manufacturers who don't specify capacity at the actual battery voltage, or, better, energy capacity. Always use energy -- measured in Wh -- to estimate the battery run time. This makes the battery 25 Ah * 3.7 V = ~92 Wh, and at 35 W power draw it theoretically means slightly over 2.6 hours. Apply the conversion losses and the chinese Ah derating, and 2 hours run time doesn't look bad at all.

That is interesting, and I see what you mean. I guess it's a tricky one to specify accurately, as you can only specify the battery capacity as it supports so many voltages. It is a bit disappointing though!

The good thing about this particular pack is that it also works in pass-through, so you can leave it connected and charge it (quite slowly) while running the scope.

I'm just running a test on a 40000mAh pack to see how that fares, but it doesn't support pass-through, so may not be worth the extra hassle. It reports 2.3-2.4A of current draw at 15V, so on that basis (40Ah * 3.7V = 148W) it's got over 4 hours of running.
I'll post up the actual running time once the scope dies

J.

[shapirus]

I guess it's a tricky one to specify accurately, as you can only specify the battery capacity as it supports so many voltages. It is a bit disappointing though!

This is exactly the reason why specifying not charge, but energy capacity, in Watt-hours, and conversion efficiency at different output voltages, is the right and universal way of doing it. Having these two, the customer can adequately compare different powerbanks and estimate how long they are going to last in a particular scenario.

It reports 2.3-2.4A of current draw at 15V, so on that basis (40Ah * 3.7V = 148W)

Make sure you make no mistake in units calculation to avoid misunderstanding the concepts of power, current, charge, and energy. Multiplying Ah and Volts won't yield Watts:

1 A = 1 C / 1 s [current, aka charge over time]
1 W = 1 J/s [power, aka energy over time]
1 A * 1 V = 1W
1 A*h = 1 A * 1 h = 1 A * 3600 s = 3600 C [charge]
1 W*h = 1 A*h * 1 V = 1 W * 1 h = 1 W * 3600 s = 3600 W*s = 3600 J [energy]

[LonnieU]

I purchased a Baseus Model BS-30KP365 for a USB Soldering Iron and for other general purpose usage awhile back.

https://www.amazon.com/s?k=B08JV4W4NY

Ran my DHO924 for an hour and 45 minutes today and it took the pack fully charged down to 56 percent. Negotiated for 15vdc and ran 2.1-2.2 amps.

[jsobell]

I'm just running a test on a 40000mAh pack to see how that fares, but it doesn't support pass-through, so may not be worth the extra hassle. It reports 2.3-2.4A of current draw at 15V, so on that basis (40Ah * 3.7V = 148W) it's got over 4 hours of running.
I'll post up the actual running time once the scope dies

J.

Yes, I get almost exactly 4 hours of running from the ROMOSS 65W 40,000 mAh pack.
The only thing I'm not keen on is that it only has a single USB-C ports, so it doesn't support pass-through and you can't leave it connected to recharge when the scope is powered off.