hello today i will be showing you how to wake up a dormant with himself
there's number of different with themselves such as your most one of the
most common is the 18 650 sell a little little bit bigger than a double a
battery
and these are commonly found inside laptop batteries
certain rechargeable flashlights cordless vacuum cleaners list goes on
and on
even there's about seven thousand of the ex more than 7000 of these inside a
Tesla automobile
so that's one style and then you have your more traditional flat style cell
which is commonly found in your cell phone now basically be lithium batteries
at very volatile battery will help proper battery management they can be
relatively dangerous as well and the batteries actually have something inside
it's actually a microchip that manages charging and voltages of the cell and
basically those chips manage three main from main components mean things one is
over voltage so if you charge the cell to a voltage too high and bring it into
its danger zone under voltage and if so if the voltage drops too low it will
actually completely disabled powerful and temperature and so what I'm going to
basically show you how to do is wake up a cell phone battery one that has gone
into dormancy due to a low voltage now problem or the reason may have the low
voltage cut out is because if the voltage gets too low on one of these
cells number one starts starts losing capacity overall storage battery storage
capacity so the milliamp hours or 10 hours depending on how that
manufacturers rating that battery number two is if the voltage gets too low you
retry recharging the battery
I can actually actually become dangerous and
and explode or start on fire and most of the ones i have found cut out about 2.9
volts which is getting pretty darn close to the been that bad zone there now if
you purchase a battery replacement battery online or if you have multiple
batteries for a cell phone
this one I'm just using example it's a fairly old for the morn out sprint sanyo
send you
5500 guess this is probably from policy 2002-2003 so this phone is about 10
years old and the original battery
this has been sitting in a drawer for a good price six or seven years at minimum
and you know what happens is and I've done this myself is you know you have
spare batteries for phone while you do not swapping your batteries out
regularly but my keep one as a spare for travel and what not and you know sit in
a drawer battery might lose I lose some voltage over time and then emergency cut
out might might enact what that will do is it stops
well if you have this in the fold it would stop the power flow from flowing
out it would stop that whatever devices in from drawing any more power out of it
so demonstrate here now
the terminals on this battery our label so you got a positive and a negative and
then the center one is actually the temperature sensor
so as you can see on the multimeter zero volts but it's not actually zero volts
one like I said once it gets to a certain voltage it cut all power to that
badly
so now I don't deal with
cell phone battery is very much but I do deal with the 18 650 style when
rebuilding the laptop battery packs this battery pack actually had c4a qualities
12 the 18 650 so I do have 18 650
sighs charger unfortunately it's not compatible terminal lives for charging
this lithium self but they're both pretty much the same chemistry they both
have the same charging voltages and cut-out voltages
now one of these is considered dead lithium cells considered dead when
voltages about 3.2 volts and they also considered full the voltages are at
approximately four point two volts so just as an example this 18 650 is at
four . 13 volts
so what I did is I had some spare multimeter leads from another project of
mine and I just connect i use clothes pins you know not the most scientific I
used clothes pins to connect them up to the correct terminals so I'm nice thing
about the this 18 650 charger is it is microprocessor control and it will stop
at the maximum voltage and it will adjust charging rates
accordingly so just to show you that that 18 650 is uh
working she should be able to see the little green light there and i'm just
going to use the leads i have here this is positive and negative just show that
power flow is not happening
yeah
just my wire is just a bit try again
my damaged one of my leads earlier actually might even if it might be
reading that one is full
those are reading as before
let's just go ahead and try it anyways I think those are all a little too high
for to start checking in
so we put one on what the positive on the positive mark bullion terminal and
negative on the negative there we go at those are full
see now the light has turned red which means the battery is in fact accepting a
charge
ok
now that we gave it a little bit of a charge that battery management circuit
should have woken up if you see the multimeter
we're at three point one six bolts
now there and it's probably going to drop down since I only did that for a
few seconds
that's probably just enough to get enough surface voltage in the battery to
wake up that chip
now the reason why you might have to do it outside a phone instead of being able
to put it in a phone
the problem i'm running into is the circuitry inside the phone since this
phone is also the charger
how will not activate or turn the phone on to be able to charge the battery
if the battery is below a certain voltage or what the phone considers dead
and it's done for a few reasons and one is so they can make more money by
selling you more expensive batteries and I already know because i've been playing
with this one already already actually I walk this battery up and then i read
rained it
I'm after testing to make sure it was still a good battery and I could always
demonstrate because i'm running out of batteries to demonstrate with so we're
just going to hook this up again and we're going to leave it on
tell all that multimeter will show
we want that multimeter to show about 3.2 volts and see what you do have good
chopstick skills
during charging 13.5 take the charging leads off
few more seconds
yeah
and we just need that surface voltage on the battery to stay above the 3.2 just
long enough for your mileage may vary depending on the phone but this phone it
would be about 3 . 2 volts
just long enough to get it in the phone
and
get it to start charging the battery
see if we can turn it on
sorry button
and we go powering up
and that's how you wake up a laptop I cell phone battery my head one
we're at a fair you fairly large family talk a family plan for a cell phone you
up with US cellular and not while we get free phones or are discounted phones
every two years for each one of the numbers we have six lines with them on
the one large plan myself friend my parents and my grandparents well my
grandparents have had their phones for about three years and they finally
figured out how to use them
and while they're there they're mid 80 so you know even the vcr still
technological marvel for them and I'm sure half people watching this don't
even know what a VCR isn't for but they're definitely not going to be
changing phones unless they're forced to
so every two years it's either take it or lose it for our new phone so we get
our are discounted phone or which is usually anywhere from a penny to buy
fifteen dollars
why not if we don't take it it's not like clocks going to reset that . we
just lose all down on you know two years with phones so i get a stash of a new
phones that come up pretty quick and I'm usually pretty good about plugging them
in once every four or five months if we're not switching over but just did
one open one up we were running running a little low
my dad goes through them like you can't believe and
we were just replacing another one that finally bit the dust we're down to our
last our last spare phone
new phone some of the older ones you know
not you know work in the best and it's been sitting in a box in the shelf for
about a year now and the battery went into dormant mode when charged it so
popped it out
it's almost like a jumpstart in the car when you use these tiny little jump
jumper cables and now I want you know woke it up just enough to get the cell
phone to start charging it and within about two hours of battery was full and
it had pretty much its original it seemed to lost a little bit of its
original capacity but not enough to make it worthwhile
and the nice thing is i was able to order a new battery for it off the
internet for about 4 bucks so I have kept this video I'm going way longer
than it should have
it's like midnight tonight
brains not going one hundred percent so hopefully that might save you a few
bucks
another way this is useful is so yeah get lost or damaged your charger for
your phone to get some important numbers off of it and now that everything's
pretty much switching over USB it as the charging cable
it's not as imperative as it used to be but you know proprietary cables like
like this one and the most mostly standardized mental but you can do that
to charge up the phone you you're going to sit there for probably about 15 to 20
minutes charging the battery but you can charge that battery up enough we can at
least get the phone on stay out long enough to get your numbers off
it's always something good to do
let's see now I know that everybody's going to have 18 650 charger available
to have
not even just see now that one lights up
the world may never know if you don't have these nice charges
you can get these at No Deal extreme which is addy admit the letter D as in
dog
x is an xray that calm dx.com this lithium cell charger and it does a
number of different sizes the lithium batteries cost about four bucks free
shipping straight from hong kong
so even if you just have one if you ever use anything with a 18 650 cell is great
for flashlights I use mine
my new flash like this thing this is bright almost like a lightsaber out not
funny day
very very bright you can use a USB cable
you have old iphone
yeah old iphone cable you know we upgrade your iphone you get the old
style plug you have any other kind of USB cable that you don't need anymore
it's junk
the old fat style plugs on from the nineties you can cut the end off
separate the wires out not fiction of the wires are touching each other plug
it into a computer and use your multimeter to find which wires are
positive and which are negative and you can actually use those positive negative
wires to jumpstart your battery
the average what might not be as high but USB is rated at 5 volts so it should
be just fine for for jump-starting a battery until getting it
woken up and being able to charge money on the phone itself in that covers it
i'm going to stop rambling you have a great mate see you next week