In this video I take a look at the DoSHIN Universal USB Power Bank. I test the unit and then tear it down to take a look inside.
The main reason for this is I am looking for a cost effective way to get a large battery capacity for projects as well as a 5V power regulator and charging circuit. In this unit there is also the added benefit of an LCD to show the remaining battery capacity.
Show Website: https://www.mtechshow.com
Episode 36
Price:
Exactly How We Planned
(978)
Price: $3.99
Not Exactly How We Planned
(as of October 24, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price: $14.99
The 48 Laws of Power
The 48 Laws of Power (as of October 24, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price:
It sure has 6800mah 18650s in it 😉
but is it really 5000mah?
is this a lithium battery ? didnt have time to watch all this vid
hi man! i recharge my iphone6 on 5v 2.1A or 5v1A? what is the diference?
Is the device safe?
Utter useless video
Hi, I bought a DoShin 50000Mah similar to yours on Ebay and it had trouble running anything, although the touch that was built in to it was very bright. Maybe I will pull it apart and try to use the rechargable batteries.
Very helpful video. So what was the actual mah capacity obviously not 50000??
Perhaps 50000mah converts from Chinglish to 5000mAh. 1CNY=0.15USD :p
I took apart an Adata 10000 mAh powerbank, (flashlight, dual 1A/2A ouputs, 4 LEDs for batttery status).
The 2 ports were connected in parallel (continuity between pins)… Max output current about 1.2A, but then the voltage drops to about 4.2V.
Nice job! I appreciated your pace, and you helped me take apart my older power bank that stopped working. I thought maybe the unit was glued together, your video was very helpful 🙂 Thanks for showing the amp draw on the battery ports too. Much appreciated.
I imagine the port amperage listed on the case is reversed to how the circuit board is laid out.
In malaysia we don’t have DoSHIN brand we always gets the chinese named ones and they are crap… claims 10000 but actually more like 6000 mah so I made an ugly looking actual 20000 mah power bank!!! and all of the batteries I use in it are the NCR18650PF (MH12210) these batteries lasts me good I don’t have to charge it everyday it’s like 3 days of use then recharge for just 6 hours 😀
I just received my Universal USB backup power bank ( that’s all it says on it, No brand name since it’s straight from the Japan factories in guessing) it says Cap: 100,000mAh 3.7V/48Wh (MAX) and the ports amps and colts are just as yours says. I received it with 56% charge out the box standard connectors 4 in 1. I charged it over night and it was at 100% (about 6-7hrs charging) but 5 mins of the charger it went to 99% without even being used. About an hour later it said 94% (without being used yet)
I just ordered one on amazon now, didn’t know if I should of got something else? ? I pay $23
hi, good vid. how well would this work via dummy battery, to power Sony A7s?
hi r u from Australia? 🙂
Do I need to put batteries in?
Really informative abt these lying advertising Power Bank companies .
U got th truth unveiled 😀 😀
Subcribed. 🙂
awesome video , pretty usefull!!
That was a super useful video, I did find that anything over 12000mAH quite skeptical, although I was quite close to buying one myself. What would you suggest to be the best MAH amount to purchase?
,i received it yesterday this battery bank ,so first i put on charge start on 50% but its takes more than 5 hours to charge it full to 100% ,when its full, for testing it i charge a tablet and a phone but its drain so fast ,and now from 20% to 100% its takes me more than 7 hours to charge it again 🙁 ,,do not buy this item
it had just arrived i bought it from ebay for 14 dollars and it looks nice but i hadn’t try it yet , thx for the useful video
Thanks for video. I couldn’t help but be your next subscriber making me number 10.001. !!!! I am looking for videos like yours to help me decide which power bank to purchase. I have 4 requirements that must be met. 1. cheap 2.charge-discharge protection 3.anywhere from 5-8 cells. 4. can power device while charging. I plan to purchase the 18650’s locally. I would deeply appreciate any suggestions or links from anybody.
missing the vital real capacity from the vid, wish i had just read the comments before waiting the whole video to see the capacity.
So just to be clear… is this portable charger actually rated at about 9000-10000 mah instead of the advertised 50000 mah? I just bought this for 20$ from Wish. Was i completely ripped off or does this charger still have some worth for the 20$ I spent on it?
I got one these and I’m not satisfied. it’s better than my Chinese no brand one. but my old Rav from 3yrs is the best but not as good looking. i will take quality over appearance.
the best battery on market is 3400mah times five cells is 17 Ah in bast case scenario, Keep in mind this battery is 7$ each. So if this power bank isn’t 50$ straight from china , there is no way that battery is in there…
but you can buy case for this kind of power bank on ebay for ~5$ and put whatever cells you want in there…
You can pull way more power out of lipos. High quality ones deliver up to 40C, 80 amps in this case.
I have one from ECtechnology and it works very well. The ports will put out the rated amount of amperage, providing that the device being charged will take 2.1 amps. I have load tested each port and was able to pull 2.15 amps from the 2.1 port before the unit shut off. If you pull it apart then you can test each cell for their WH’s and MAH in a discharge tester, then add up what you have and that is what your pack has on tap. However, remember the circuits inside the unit will eat some of that power so bank on a 10% loss, also the cable being used and the device being charged will decrease the number of charges if left on while charging. At least you will know what the max available power is and it will be most likely less than rated power. Mine is rated for 22,400 MAH and that maybe true at the batteries, but not when the converter sucks up some of it. I got about 11,500 mah out of mine. It is still pretty good for a two year old battery pack.