Affordable but accurate capacity tester

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ZoomieFan
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Affordable but accurate capacity tester

I’m looking for a good/accurate and affordable tester for power bank capacity.
Currently I use “USB Safety Tester” but the results differ greatly. https://www.aliexpress.com/item/1005001420587393.html?spm=a2g0o.productl...
For example 69Wh and 56Wh for the same power bank under exactly the same conditions.

1] The price should be e22/$24 or less excluding shipping; otherwise customs add a lot of fees.
2] At least 5A.
3] Far more accurate as what I have right now.
4] QC3, preferably QC4 to make it more future proof.

Who’s my guiding (flash) light in this matter? Smile

BTW I’m considering Riden 34C and TC66C
https://www.banggood.com/RIDEN-UM34C-For-APP-USB-3_0-Type-C-DC-Voltmeter-Ammeter-Voltage-Current-Meter-Battery-Charge-Measure-Cable-Resistance-Tester-p-1756337.html?cur_warehouse=UK&rmmds=search

https://nl.aliexpress.com/item/32968303350.html?spm=a2g0o.store_pc_group...

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, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5, Xtar PB2S 5/5
Waiting for: (DQG Tiny) 21700 EDCs.

Edited by: ZoomieFan on 06/28/2021 - 03:22
d_t_a
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At below $20, I think the Rui Deng (it seems now simplified to ‘Riden’) meters are acceptably good. I do have several RD USB meters (“RD USB 3.0 comprehensive tester” which is an older model / UM25C (the earlier version, there is a later version with a few minor changes listed but I haven’t tried that) / UM34C / AT34), but have not really tried using them for measuring capacity, so am unable to comment how good it measures capacity.

I use ZKE-Tech EBD-USB+ meter connected to a Windows PC to check powerbank capacity, both input (charging the powerbank) & output (discharging the powerbank), as the EBD-USB+ can be a USB meter and also a load tester. Downside is that the EBD-USB+ requires connection to a computer as it does not have any display.

Regarding Riden’s meters, the UM25C is actually a more ‘accurate’ meter than the UM34C (the “C” is the “communication” models — with bluetooth), there is an Android app (I’m not using iPhone so I don’t know if there is an Apple app). It also has a basic Windows software. I’ve seen some 3rd-party apps for the Riden meters, but haven’t tried them though, for instance, one of them (I haven’t tried personally) can be found here (Windows / Linux): https://github.com/kolinger/rd-usb

UM34C supports up to 4A whereas UM25C supports up to 5A. The UM25/34 will detect QC2 / QC3 protocols in use, but it does not have ‘protocol auto-detection feature’ unlike in many of the more advanced (and more expensive) meters.

I would suggest the QWay U2p (newer 4-button version) if you can find it, this supports QC4/PPS detect.
I have also tried the FNirsi FNB48, which seems to have similar feature set at the U2P (maybe has a few more), but FNB48 may still have some bugs as it’s newer and may not be that well-tested.

I still like the ZY1276 USB meter although it doesn’t have new features (eg. QC4/PPS).

I haven’ tried some of the newer USB meters though (ZY1278, ZY1280, KT002), which are more expensive and I think these may be slightly more ‘premium’ than the QWay/Fnirsi.

The Riden are more basic, but generally does the job fairly well (but regarding your ‘capacity test purpose’ = something I haven’t really tested, as I have been heavily reliant on the EBD-USB+ meter/tester. (The EBD-USB+ probably can fit in your $24 budget if you look around, but the EBD-USB+ requires a Windows PC to work best, otherwise by itself, the device does not have any display)..

acab
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I use the RD TC66, it has 6A max output and is for USB Type C. available in their AE store and also has the price range you were after. This is my second RD and it is reliable, works as intended and they have frequent sales. The company is even a member on BLF, I think.
It works on USB phones, chargers and all devices I tried them on.

bilakos10
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At the < 24$ price range, I’d say that the TC66C is perfect.
I’ve been using it for a few years now and it’s been rock solid.

ZoomieFan
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TC66C it is.
Thanks for the suggestions!

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, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5, Xtar PB2S 5/5
Waiting for: (DQG Tiny) 21700 EDCs.

ZoomieFan
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TC66C arrived. I’ve used it for a few weeks and the display no longer turns on.

Before I contact the seller, could a reset fix the problem? If so, how can I reset it?

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, FiTorch MR35 3/5, Haikelite SC26 HD 3/5, Lumintop Tool AA/AAA 4/5, Nitecore LA10, Sofirn C01 BLF 3200k/5600k 2/5, Zebralight H600Fc 3/5.
Powerbanks: EasyAcc 26800 mAh 3/5, Xtar PB2 4/5, Xtar PB2S 5/5
Waiting for: (DQG Tiny) 21700 EDCs.

d_t_a
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ZoomieFan wrote:
TC66C arrived. I’ve used it for a few weeks and the display no longer turns on.

Before I contact the seller, could a reset fix the problem? If so, how can I reset it?

Maybe can try checking first if the USB meter can still be recognizable when connected to a PC?

Download the RuiDeng USB Meter here (software in RAR compressed format = will require Windows PC)

http://www.ruidengkeji.com/rdupdate/software/RuiDengUSBMeter/

There is a Driver Installation tab (need to install driver first). Connect the TC66C using a USB-to-micro-USB data cable.

The TC66 firmware file is here: (TC66.bin) (might not be needed — I think the above software should automatically find the latest TC66 firmware file)
http://www.ruidengkeji.com/rdupdate/firmware/TC66/

Maybe check if a Firmware Update can fix your TC66.

Note: when doing TC66 “Firmware Update”, it should not be in “Connected” status.
The “Connect” button is when we want to see the USB data (voltage/current/etc) on the PC screen.

As of this writing, the latest version of RuiDeng USB Meter PC Software is v1.0.0.6
and the latest TC66C firmware is version 1.15