This video is just a demonstration of how salvaged lithium cells can be put to good use for either decorative or functional lighting with minimum circuitry.
It also shows a way to test whether a small cell has active protection.
Note that the short-circuit test resistors get hot quickly if there is no protection circuitry or the cell is rated for very high current. They should only be applied very briefly.
It's quite a neat way to add a bit of extra self-contained decorative lighting to your workshop or home that will stay lit in the event of power failure. If the battery is made waterproof with a plastic bag or other cover then this technique can also be used to add lighting to small plants/trees outdoors.
As always with lithium cells, make sure they are protected from physical damage and don't show signs of previous damage like significant sharp dents or puncturing.
The best way to render a lithium cell safe is to discharge it to 3V or less when there is little energy left to cause fiery incidents.
The charging modules shown are intended for traditional lithium ion cells with an upper voltage of around 4.2V (average voltage 3.7V) and are not suitable for LiFePO4 type cells that have an upper voltage of 3.6V (average voltage 3.3V) unless they have their own protection circuitry to cut off the charge at full capacity.
The lithium content calculation was based on roughly 0.3g of lithium per 1000mAh original capacity of a rechargeable cell. An equivalent non-rechargeable cell uses more lithium than one that can be recharged hundreds of times, but crams about four times the capacity in the same space.
In hindsight, maybe the title of this video should be "Inventing ways to use my stash of lithium cells."
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
It also shows a way to test whether a small cell has active protection.
Note that the short-circuit test resistors get hot quickly if there is no protection circuitry or the cell is rated for very high current. They should only be applied very briefly.
It's quite a neat way to add a bit of extra self-contained decorative lighting to your workshop or home that will stay lit in the event of power failure. If the battery is made waterproof with a plastic bag or other cover then this technique can also be used to add lighting to small plants/trees outdoors.
As always with lithium cells, make sure they are protected from physical damage and don't show signs of previous damage like significant sharp dents or puncturing.
The best way to render a lithium cell safe is to discharge it to 3V or less when there is little energy left to cause fiery incidents.
The charging modules shown are intended for traditional lithium ion cells with an upper voltage of around 4.2V (average voltage 3.7V) and are not suitable for LiFePO4 type cells that have an upper voltage of 3.6V (average voltage 3.3V) unless they have their own protection circuitry to cut off the charge at full capacity.
The lithium content calculation was based on roughly 0.3g of lithium per 1000mAh original capacity of a rechargeable cell. An equivalent non-rechargeable cell uses more lithium than one that can be recharged hundreds of times, but crams about four times the capacity in the same space.
In hindsight, maybe the title of this video should be "Inventing ways to use my stash of lithium cells."
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
Which version of moto g do you use?
Aye bro, It's about to be winter here and a lot of homeless die from freezing…….most homeless have access to a simple battery bank/outlet or cells from the battery recycling bin. Think it would be possible to come up with a simple "personal heater" that could be made out of materials scavenged and plugged into USB or even just like a modded dollar store light or aa,aaa cells?
Maybe 2 items from the dollar store combined makes a pocket heater?
Something that simple that's accessible could save lives.
cheers brother
Hola nunca fui a la escuela de electrรณnica, siempre me a fascinado el tema, hago pequeรฑos proyectos con Arduino .Ahora reciclo una baterรญa de telรฉfono, con un TP 4056 y alcanza los 4.30 volts no apaga el led rojo (cargando) y por lรณgica no enciende el azul (cargado) busque todo el dรญa como reducir la histรฉresis entre encendido y apagado, pensando en voltaje. A pesar de no comprender con precisiรณn tu explicaciรณn, veo que la histรฉresis entre encendido y apagado es controlada por corriente, (i) voy a quitar la resistencia de 1k y pondrรฉ un trimpot, espero conseguir cambios en la histรฉresis, desde hace tiempo eres una de mis profesores favoritos de electrรณnica nunca me di el valor de hacer comentarios. Saludos desde Queretaro MX
Putting one in a toy Tesla and running 30 volts through it is a lot more fun than LEDs, though not educational.
The Engineer PA-09 crimping tool has been splendid for Molex KK and those JST connectors. Nice price too.
Damn ' if you use this small like Oneway Vape pens' be Carefull ' i got it very very hot after like near 5 minutes or so '
so check with your hand ' when gets too hot ' disconnect fast the cables ' and let it lay on a cold plate or metal… then reinstall ' .
__ Take Care Guy's don't burn you down cause of a bit of smogg'. Peace out. ________________________
____________________________________________________________________________________________________________
ps:
and control before u do' with an voltmeter what plus and minus is… cause i had like one white + the – was black'.
and never smoke with an open battery connected to your face ' you could stay eyeless. / Shalom Selam & Peace.
There is nothing better than to do some electric math with The Pink Calculator)
I hate using my JST crimping tool. The size for breadboard size wires are difficult. I'm sure I'll find an easy way with more practice.
What are the typical pcb board lithium battery plugs like for Arduino and all over I meant general , jst they are so many types and molex also millions other types, is ther a rule for that and best compatibility? ๐ค
Just to say your a genius and a good laugh. Keep up the humour ๐๐
As someone who's been thinking about getting back into hobbyist electronics for the first time since I was about 12, these videos have been an absolute goldmine for simple, useful tips and bucketloads of information, free of the oft-seen "you need ยฃ200 worth of tools & equipment before you even start" gatekeeping of hobbies like these. Like here, strengthening (and I suppose insulating too) bare leads using nothing but a hot glue gun and some heatshrink! Simple but brilliant.
Thanks for your work & expertise in putting these together in a way that even an idiot like me can understand. And if you happen to be reading comments on this old video, I must ask where you get your equipment from, particularly those micro molex connectors? The only places I can find sell a single pair for about ยฃ2, or a million pairs for ยฃ20. Either way, a bit of an investment for a single project that I might give up on halfway through! ๐
you show the safe application in electrical circuits, it is nice to see the methods and explanation
of how things safely work together. plus the use of the connections for easy applications with universal
connections and various resistors. along with changing set up for the battery.nice video
I'd say the clamp meter was fairly accurate.
That ending "Not Kiddie Toy's ect ect" … There was me watching this thinking of maybe converting some of my sons toys to use a rechargeable cell. I suppose I will just buy a pack of proper rechargeable batteries and a few chargers in that case and do it properly.
I think I need to get some molex connectors… ๐ I recently came across some old cell phones (fliip phones, when was the last time you saw one of those?). A couple of them actually charged their battery when connected with a USB cable. These batteries are small rectangular units with four contacts. Two of the contacts are labeled as positive and negative, but I have no idea what the others are for. Your thoughts on this? They're Motorola BQ50. Markings indicate a rating of 910 mAH., 3.4 WH.
What an amazing video! Loved the whole video!