A look inside a few different 18650 style USB power banks, including a test of their quiescent current in standby and their upper and lower charge/discharge cutoff points.
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I am using this chip/circuit to charge a laptop battery (that stopped charging) I discovered it gets VERY HOT but is self limiting? It has no fuse. I am manually charging one of the three batteries ( 3 X 4V= 12) at a time as I think the relative grounds on three simultaneous charging might fight/SC each other. Over 50 degrees Celsius with my bodge temperature gauge probe
there should be a warning triangle on the bottom of the case just poke your screwdriver next to that triangle and it will pop open with no clips in the way.
does it have short circuit protection?? both of two power bank?? that you showed in this video??
i was thinking if im going to replace it with 3 old smartphone battery in parallel connections which is in good condition im just gonna remove the PCB of the batteries and put it in that power bank.do you think is it safe if im going to make it??? i hope you reply. thanks
Got one in Pound World, like it so much bought another one in yellow.
Fun fact. Poundworld are selling those single 18650 banks with a 1200mAh battery fitted. Not bad for a quid.
no sounds
so i can use this to charge my 18650s?
Any idea of what could cause a failure mode on single chip version, where the chip on the board gets hot at 91°c, and stays there without anything connected?
what is that module called
ive been trying to find better schematics for this one its seems like in your video is not complicated so im wondering if you posted it or you have a linked to that one
Ta! The 2nd type appeared at the Dollar Store before xmas for $3 CAN.
What are those blue cells called?
I have the same style power bank as the second one. If I wired in ANOTHER 18650 in parallel would it still work and/or last longer? I have at least a dozen of 18650's from laptop power packs and am wondering; Can I wire them ALL up in parallel to make a MASSIVE usb power bank using the circuit board from the power bank? Sorry I'm a bit of a noob when it comes to electronics like this.
I've had that happen…I hooked a camera battery up to my multimeter, and it read 0.00 on the volts, even on the Battery setting at 9v setting. For some reason, I can't use the 1.5v setting on my meter's Battery function.