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Do-it-yourself powerbank for 21700 batteries 

TinkerBox
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30 окт 2024

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Комментарии : 27   
@ericklein5097
@ericklein5097 Год назад
Is there any warning about the powerbank requiring high discharge cells to safely handle the high current draw from the boost converter? If there's really a 66W output that's nearly 10A per cell.
@Tinker_Box
@Tinker_Box Год назад
I tested this with my Pinecil irons and the powerbank shut off irregularly. I think it does have some protection!
@luiscamara1
@luiscamara1 Год назад
I love this channel
@Tinker_Box
@Tinker_Box Год назад
So do I. Thanks :) :) :)
@ediik
@ediik 6 месяцев назад
i had 2 INR21700-40T from a project left and wanted to Build this Powerbank... it seems taht the Charging Curcuit only recognizes 2500 mah cells... anybody else with this problem_?
@sakshichhetri2263
@sakshichhetri2263 Год назад
Nice
@marciozomb13
@marciozomb13 8 месяцев назад
How can the powerbank deliver 9v/12v from PD with a 3.7v cell? They are connected in 2P right?
@Tinker_Box
@Tinker_Box 8 месяцев назад
Step-up converter.
@johnmiller8412
@johnmiller8412 Год назад
Is it similar to hoco brand
@Tinker_Box
@Tinker_Box Год назад
I think Hoco came after these appeared out of blue one day in the AliExpress. Who came first? Who knows? There were a few models with different configurations such as numbers of the batteries. But soon after they popped up, now they are not seen so much these days. It’s a kind of mystery product from deep underground Shenzhen China ha ha.
@curits8260
@curits8260 Год назад
is the amp does not matter? any battery atleast 3.7v will do?
@Tinker_Box
@Tinker_Box Год назад
Batteries of the same spec should be okay.
@Sadursha
@Sadursha 4 месяца назад
bro how find 21700 battery s
@Tinker_Box
@Tinker_Box 4 месяца назад
I got mine from Aliexpress
@Sadursha
@Sadursha 4 месяца назад
mm but shipping cost💀😢
@Tinker_Box
@Tinker_Box 4 месяца назад
@@Sadursha Just get a piece of factory made charger. That’s cheaper than DIY.
@Sadursha
@Sadursha 4 месяца назад
​@@Tinker_Box mm thanks bro❤
@markmartinez9031
@markmartinez9031 10 месяцев назад
We jave a somilar spot welder
@Tinker_Box
@Tinker_Box 10 месяцев назад
Do you like it?
@markmartinez9031
@markmartinez9031 10 месяцев назад
@@Tinker_Box initially yes. But after 2 yrs of use I notice welding power is reduced
@Tinker_Box
@Tinker_Box 10 месяцев назад
@@markmartinez9031 Mine is exactly like that. It’s much weaker now.
@markmartinez9031
@markmartinez9031 10 месяцев назад
@@Tinker_Box I haven't tried to open mine, maybe the battery is the culprit
@Tinker_Box
@Tinker_Box 10 месяцев назад
@@markmartinez9031 yes, may be. 😀
@deraid712
@deraid712 3 месяца назад
10000 is max its only 2pcs, and they have less capacity than 5A usually more like 4a so its 8000mAh and its useless
@jub8891
@jub8891 2 месяца назад
its not useless if you have 21700 cells lying around
@ericklein5097
@ericklein5097 Год назад
Well those are some obviously BS cells. 6000mAh? They surpassed Samsung, LG, Sony, Panasonic, Molicel, Lishen, EVE, and BAK! The Samsung 50S is already irrelevant!
@Tinker_Box
@Tinker_Box Год назад
Right you are. Don't go for this one :)
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