Tag: capacity measurement

Hacker Eco-X TopFuel 5000mAh 6S 111Wh 20C LiPo battery pack (WHL #31)

Hey! What’s the thing that this blog needs the most?

Yep! Another battery post! :mrgreen:

So, last one of the big lithium batteries today. We have a Hacker (nice brand name!) “TopFuel LiPo 20C-ECO-X 5000mAh 6S” unit. I think this could be the first item to carry an EAN number (4250320228615) on the label – and it very well might be the first one where the manufacturer that directly sells these puppies (for 93€ a piece) does not appear on the first 100 Google results on exactly this number. That’s a pretty shitty rank for a manufacturer AND a web shop, I have to say…

I’m also not sure about the technical details on the shop page. […]

22nd October 2017 16th October 2017 By Bzzz In No Comment

Kokam Lithium Polymer 5S 4000mAh 30C battery (WHL #30)

Yawn. Another battery pack. But also new hardware for the electronic load, so testing conditions have improved :)

Today’s item is a Kokam SLPB 400030-0501K(9543140H5) battery pack. Kokam is one of the big players in lithium polymer batteries, and given the battery was purchased at the same time as the last item, I guess this one wasn’t a cheapie as well. No Wan Hung Lo this time, but after all, it’s not an item that I bought… ;)

It is clearly aimed at RC stuff, having 4000mAh at 30C discharge rate, 18.5V nominal / 21.0V max voltage, 8000mA charging current. […]

15th October 2017 15th October 2017 By Bzzz In No Comment

O’CELL 26650 LiFePO4 8S 3.3Ah battery pack with BMS (WHL #28)

Same thing again – but different manufacturer. That’s what you get when you clean up your new lab… ;)

I know, might be boring to see another battery pack with almost identical specs (3.3Ah instead of 3.2Ah), but trust me, this is like night and day – or like quality China and Wan Hung Lo.

Of course these two batteries were purchased at the same time for the same thing, and they cost around the same as well. But (spoiler!): These two units work fine.

Top view:

Nice shrink wrap, proper label (shout out to O’CELL and their caring but not nagging sales people). […]

24th September 2017 3rd October 2017 By Bzzz In 2 Comments

26650 LiFePO4 8S battery pack with BMS (WHL #27)

This weeks article is another by-product of the ADC testing (WHL #26) from last week. Could’ve packed in there, but I wanted to share some remarks on Chinese battery technology…

So first of all, this isn’t a piece of kit that I bought myself. After testing two 12V/2.2Ah lead batteries from work that were sitting unused on a shelf for five years, I needed another victim. Those quality Panasonic cells were flat as Kansas – the LC-R122R2PG datasheets recommends 8.6V cutoff voltage at 3C = 6.6A or 9.7V at 1C. Fully charged, they delivered 1C at 7V or 1.5C at 2.5V at full charge – slow 10.5V discharging to 0.1C cutoff and recharging didn’t help much. […]

10th September 2017 10th September 2017 By Bzzz In No Comment

USB detector 3.0 High voltage 4 bit OLED QC 2.0 Digital detector voltmeter ammeter voltage current power capacity tester meter (WHL #17)

New at Wan Hung Lo:

…wait, what?

(I’m pretty sure you’ll be able to find my address if you want to, just making it a little harder for google to index it as an image…)

So, what is it actually? Sure, it’s the USB power meter from the blog title. Who would have thought!
Bloody kids with USB 3 toys! Back in my days, we had…umm, good old RS-232 :lol:

I bought this one month ago at AliExpress for 8,61€ including shipping. As you can see, they decided to use some tracked mailing instead of the “ah, no worries” cheapo variant. […]

26th February 2017 3rd October 2020 By Bzzz In 3 Comments