Anyone have a line on LiIon batteries?
This one is 65mm long x 18mm diameter, JST type connector is 2mm pitch.
Its a 18560 cell, very common type of LIPO battery.
They can be sometimes hard to buy though, as most of the suppliers are in China.
Try googling for a source near where you live.
Found these one with leads, I think this could work.
http://www.miniinthebox.com/ultrafire-4000mah-3-7v-18650-rechargeable-li-ion-battery-2-pack-battery-case-included_p458813.html
Could give me increased on-time time.
Perhaps a battery for a cordless screw driver will work.
Ordered some from Amazon. I need the leads so I can add the connector from the old one.
Wow! That is some IC package!
Paul__B:
Wow! That is some IC package!
I would guess it's a pin header, 2mm pitch...
// Per.
Yes, just a right angle header.
Ok, batteries arrived - and they do not have leads on them. I specifically picked the ones I did because they are pictured with leads.
Can leads be soldered on to batteries with a regular soldering iron?
I have soldered similar, but others may suggest spot welding.
Some battery stores might spot them for you.
3 days for delivery, WOW!
Ruff up a small area with a file to help the solder stick.
Must be considered hazardous or something - a guy a van dropped them off.
Battery - good idea, I'll see if local Battery Plus will spot weld some leads on for me. They rebuilt my drill battery pack, I bet they can add leads.
Be very carefull with these cells. I'm working every day with such Li ion cells (my job is to manufacture battery packs)
you must use a spot weld system to weld tabs on it.
if you try to weld with a standard soldering iron the risk of explosion is real! at one end of the cell you can see holes. it's the pressure vents.
if the cell reach over 60°C it can go in "thermal runaway" and explode.
think that the lithium is toxic and cause fire with contact to water/moisture (so it burns the lungs if you breathe it!)
you must use the cell with a safety electronic device used to cut the load under 2.5v (and over charge) to avoid chemical reaction inside who can cause...fire! (the one on your first picture have it included inside before the wires)
this thing:
or try to carefully remove it from the old battery
i've made some videos of the explosion when you try overcharge such cells.
you can see them here for info (prismatic ones from china with and without pressure vents):
http://thequark.free.fr/batteries_safety_test.zip
be careful of china cells they are very dangerous and without pressure vents! this is why I'm always working with sanyo cells.
for information the VARTA safety test on 18650 is to punch a nail through the cell. the test pass if: the cell not explode and there's no fire!
I've soldered tabs with a regular iron, just be quick about it...
I put a 16340 cell by accident wired directly to a switching regulator (pumping over 2 amps in for a good 20 minutes) , by the time I realized, the cell was a mini oven, which I quickly tookoutside... lithium cells can take a beating and are not as risky as most people portray them to be! But still I'd never leave the home alone with them charging, except my arduino charger which feeds 150ma cc/cv, it's slow but the batteries thank me for it, less heat less energy waste more cycles better battery life etc..
tell that to boeing 
have you seen my videos? this is what I've done for the test: 2Amp overcharge.
we've got fire in production with varta li-polymer batteries some years ago (3/4 times)
the lithium polymer are more risky because they use soft case (instead of solid metal for lithium ion) and a mechanical stress causes internal short circuit -> thermal runaway -> explosion -> fire
actually Sony make a giant battery return for their laptop....
on each pack I build i'm using electronic safety + 1 polyswitch for each cell + 1 thermal cutoff....to be sure....
and even with that, the chemistry can cause some problems. here is a pack I've got from customer.
bad spot welding causes chemistry to fail and cell thermal runaway.
Genesis92:
tell that to boeing
have you seen my videos? this is what I've done for the test: 2Amp overcharge.
we've got fire in production with varta li-polymer batteries some years ago (3/4 times)
the lithium polymer are more risky because they use soft case (instead of solid metal for lithium ion) and a mechanical stress causes internal short circuit -> thermal runaway -> explosion -> fire
actually Sony make a giant battery return for their laptop....
on each pack I build i'm using electronic safety + 1 polyswitch for each cell + 1 thermal cutoff....to be sure....
and even with that, the chemistry can cause some problems. here is a pack I've got from customer.
bad spot welding causes chemistry to fail and cell thermal runaway.
There is also a case a little while ago where someone's e-cig blew up in their face. Turns out the person didn't have any battery protection in his custom mod, but the news reporters neglected to mention that. Instead the spin on the story was how all e-cigs are dangerous explosion risks.
Regarding your video(s?). That 20+Gig zip file is a huge payload. Do you have a youtube/vimeo/etc link instead?
Local battery shop is putting on tabs for me - will pick them up tonight.
Older MP3 player (Neuros Audio) the battery came from has charging circuit in place already. I have 3 of them, one at work, one at fencing club, one inmy basement.
Only issue is that if power plug is attached, unit assumes power is being applied - and if its wallwart is unplugged or the powerstrip it is plugged into is turned off, it drains the battery. Done enough times, it kills the battery. Could just be old battery too, these players are like 8 years old. 80GB hard drives, still play great. USB2 interface, takes ~1 sec/song to load new music. (~8 MB/song, sampled at 256K dual stereo). 30mW output, plenty of volume.
There is also a case a little while ago where someone's e-cig blew up in their face. Turns out the person didn't have any battery protection in his custom mod, but the news reporters neglected to mention that. Instead the spin on the story was how all e-cigs are dangerous explosion risks.
Regarding your video(s?). That 20+Gig zip file is a huge payload. Do you have a youtube/vimeo/etc link instead?
the file size is not 20 gigs and we allready have fire on warehouse due to faulty lithium ion batteries.
a battery can explode ONLY due to a faulty manufacturing process -> sony laptop
they are instable due to dust in the chemistry during manufacturing creating hot spots and damaging the insulator -> local short circuit -> thermal runaway -> fire (the sony laptop)
you have the same results if you hit the battery with a hammer
look at 3:35 the pressure vent avoid explosion like on my videos (but his lungs.....)
Working with them every day let you suspicious. trust me. (12 years of experience working with such batteries)
this is why airbus prefer to keep the old sealed lead acid batteries technology even if it's heavier. like me!
it's physics! lower size with higher power = higher energy density ==> approach to explosives!
A DHL plane has already got fire due to Li ion batteries freight and now the IATA ask for lot of documentations about your batteries, CE certification, tests resuls before they allow you to send the batteries by air. if they are so secure why they ask this?
Lithium batteries have become the preferred energy source to power a wide variety of consumer goods ranging from mobile phones to children’s toys to e-bikes. Though widely used, most people are not aware that lithium batteries are dangerous goods and can pose a safety risk if not prepared in compliance with the transport regulations.
Genesis92:
There is also a case a little while ago where someone's e-cig blew up in their face. Turns out the person didn't have any battery protection in his custom mod, but the news reporters neglected to mention that. Instead the spin on the story was how all e-cigs are dangerous explosion risks.
Regarding your video(s?). That 20+Gig zip file is a huge payload. Do you have a youtube/vimeo/etc link instead?
the file size is not 20 gigs
My bad. I was thinking "Meg" and typed "Gig"... I got the last letter right 
and we allready have fire on warehouse due to faulty lithium ion batteries.
Working with it every day let you suspicious. trust me. (12 years of experience working with such batteries)
this is why airbus prefer to keep the old sealed lead acid batteries. like me!
it's physics! lower size with higher power = higher energy density ==> approach to explosives!A DHL plane has already got fire due to Li ion batteries freight and now the IATA ask for lot of documentations about your batteries, CE certification, tests resuls before they allow you to send the batteries by air. if they are so secure why they ask this?
Sorry if I confused things... I was just giving another example of where an unprotected lithium battery caused problems. Any e-cig manufacturer (cig-type or mod) worth their logo doesn't use a battery without protection circuitry.
oh ok
I understand.
my video is the explosion test of samples but with a DSL connection it's really fast to download
in conclusion these batteries must be charged (4.2v @+/- 0.5% for 3.7v cell) and discharged with care to avoid fire/failure 