well good morning YouTube my FedEx truck just dropped off box from it says dynamic
model limited I think they're also known as hobbyking and then I got these two packages
from the mailman today the small one and back it says xt60 ten of them and
then this one which I have no idea what is has so let's put that one aside here
and this one has an ominous warning sticker caution lithium-ion batteries
so let's try this new knife to open these boxes
let's see you think this side and that's all right
we can get into something think over here we go see what this is
there we go inside no this is and hobbyking this looks like a 5s so it's got six wires a
five series balance plug and then this is a little and this is a little battery monitor
warning labels and then there's like three boxes inside I think they're all the same thing and
yes looks like they are so let's see what this is kind of it's maybe 12 ounces three quarters
of a pound there's another part another open a zippy got there see if we can get up close
enough there it's a 40 C series 1800 milliamp hour lithium and it's supposedly a 5 s 5 Series
cell lithium battery pack so that's uh so this is your balance plug and then this is the power plug
and we have this little meter here and it's that way and then you have you can plug this into your
of that imax b6 charger and then I'll have to make up a little adapter for this and then this
is nineteen point one volts so this runs through the five cells number four number five so 19.1 and
we're at three point eight three three point eight four eight three eight four and eight five so it
looks like that's a battery five cells and it's supposed to be 18 19 20 volts so I think there are
two more of those in here so I'm not bore you with those details but let's see what this is
get back here these are some of these connectors as I need some of those to plug in there and I
think there's ten of them they had ten for I think it was four or five dollars on eBay and I didn't
know if I needed males or females so I just bought the combination so I mainly use the deans plugs
but these are the XT 60s which are pretty similar about the same size and I think similar capacity
so there we go what is what is this battery for so these first two packages these guys and this
are going to be used to convert my dead black & decker 18 volt NiCad battery to lithium polymer
so why did I choose one of these RC battery packs instead of using like the used laptop
batteries and the 18 650 cells a few reasons I suppose first is that these RC packs are fairly
inexpensive this one was just about twenty dollars they have a decent capacity and a current rating
of the 40 C refers to the current capacity in relation to the or this is the discharge rate in
relation to the capacity so 40 times 18 hundred milliamps is 72 amps continuous current and I
think they're rated at 50 C intermittent which is 90 amps and they're pretty much the perfect
size to fit in the Black & Decker battery box or battery case and they're pre-wired have to
do any all I have to do is solder a connector on to the Black and Decker battery connector and
they're ready to go inside the pack with the used laptop batteries I'd have to spend time tearing
apart battery pack cleaning and testing each cell and then with all the goods good cells out of the
test I'd have to group them into batches of five because I need five series cells so I'd have to
get five batteries with similar capacities to make balanced battery packs out of so figuring
the cost of the raw used laptop batteries at about two dollars each it just wasn't worth my
time to mess around with testing a whole bunch of those to save a few dollars it would cost me
you know if I got five perfect cells it would be ten dollars and this was under 20 and then not to
mention all my time to to do all the testing and then no telling how much life is left in those
used cells and then the other unknown with that is you don't know if you're getting protected or
unprotected cells until you open them up and I've seen a few videos here on YouTube where
folks had issues with using those batteries in power tools and having the power to will not
run well off the protected cell and as you saw in my testing in in part three of this video series
I saw 25 to 35 amps of current draw and I could see why protected cells might shut off thinking
that 35 amps is pretty close to a short-circuit and I think this is why the 10 amp BMS board I
looked at mentioned it was not designed for power tool use so these RC packs are brand new and they
should give many years of service and they are designed for running electric motors which is
what I plan to do with them now the one downside of a lipo pack like this is that if one of these
five cells goes bad you pretty much have to throw out the whole pack you can't just unsolder one of
these cells you might be able to tear it apart but it would be probably not worth the time to repair
it so anyway let me plug this battery into my imax b6 charger and and make sure it's topped off and
then I'll be back for the first test shortly so check back for the next part of this video series
and be sure to comment if you have any questions and and then be sure to rate and share this video
stay tuned and you can subscribe to be notified when the next part of the video is ready to post
when I have time to test these out looks like I'll check out all three batteries and then I'll
show you what I'm going to do with them so thanks for watching stay tuned for the next installment