2X Range! How to install dual batteries on the Lancer Ebike

This is the bike that I've nicknamed The Lancer 
it's a 1000 watt full suspension fat tire bike   and you probably already knew 
that but you probably didn't know   that it was built to take a second battery. That's right we have a 48 volt 14 amp hour 
battery in the frame which keeps the bike   looking nice and slim but we can also add 
a second 48 volt 14 amp hour battery or in   the case of the brand new lancers that are on the 
way it can go up to a 48 volt 17 amp hour battery   that means that between the stock battery of 14 
amp hours and the second battery of 17 and a half   amp hours you could have a massive 48 volt 31.5 
amp hour capacity which should easily give you a   range somewhere between 50 and 80 miles i know one 
of the questions you're gonna have is can this be   done to any bike and the short answer is it's a 
little more complicated on other bikes than this   because the bike was designed for it and has a 
plug waiting for the second battery there is a   dual parallel battery connector that we used to 
sell on our website that's currently out of stock.

The good news is i have a new one that's been 
in development for quite some time we've been   testing it and that is going into production right 
now so we will have a new parallel connector that   makes this possible on most other ebikes before 
i get into the installation which hopefully will   just take a single tool i want to explain 
how a dual battery system typically works   common questions are can i use a single charger 
and will it charge both batteries can I use two   chargers and charge both batteries at the 
same time when my display is showing the   battery level is that showing one battery both 
batteries a combination of the two and an average   is it just the one that has a higher charge i 
want to make sure that all of those questions are   crystal clear on some bikes like the warthog that 
were designed for two batteries from the factory   you will find three different charge ports you 
actually have a charge port on the top battery   a charge port on the bottom battery and then 
there is a third charge port here on the frame   so if you're using the charge port on either 
of the batteries it's only charging the battery   you're plugged into so pay attention to that you 
don't want to charge this one thinking you've   charged them both and go on a ride and find out 
you only have half the capacity you thought the   port on the frame however charges both batteries 
simultaneously the lancer however does not have   that separate charge port this one that's on the 
frame right here is only for the internal battery   and then there's going to be a separate charge 
port on the second battery which means you have   two options you can either use your charger 
to plug into one battery and then swap it to   the other one or if you get a second charger you 
can plug into both batteries effectively you're   doubling your charging speed now when it comes to 
voltage flow or current flow from one battery to   another that's where the circuits need 
to be made properly because a standard   parallel battery connection effectively wires 
two batteries so that they share the same voltage   but are increased in capacity so two batteries 
on this bike is going to remain 48 volts we're   not doubling our voltage but we are doubling the 
capacity or the amp hours which means we can go   twice as far so the bike's not going to go any 
faster it's not going to accelerate any quicker   it's not going to produce more watts but it will 
go twice as far the parallel circuit installed in   the frame is a little bit smarter than just 
that because it doesn't allow the voltage   to flow from this battery to this battery and 
that is critical if you have a standard parallel   connection that doesn't have that type of 
circuit what will happen is if this battery   is fully charged and this one is say only half 
charged and you plug them in at the same time   the voltage is going to flow from this battery 
to this one very very quickly until they   equalize that means a very very high discharge 
rate from this battery a very very high charge   rate to your second battery which is not good 
for either of them it could potentially kill both   batteries so we don't want that and thankfully 
that's not something you even have to worry about   the circuit is built in so that cannot happen 
so because of that when you turn on the display   what it's going to show you is the battery level 
of whichever battery has the higher charge level   now if they're equal it should be pulling 
from both batteries evenly and draining them   together at the same voltage but if one battery is 
charged up to 100 and the other is at 50 percent   you're going to drain the 100 battery down to 
50 percent until they're equal and then from   that point on they're going to drain evenly 
i think that explains the basics so let's   go ahead and put this thing on step number 
one remove the three screws on the frame step number two is to remove the cradle which 
is the bottom piece attached to our new battery all we need to do at this point is line 
up a couple of these holes at least   two and put those screws back in i almost forgot 
these little rubber bumpers they should go on   underneath the cradle before you screw it 
on bumpers are going to situate underneath   wherever you're putting the screws through that 
helps it to not only hold tightly to the frame   but prevents any rattling or wobbling don't 
forget to lock your new battery onto the cradle Now all we have to do is plug it in this is kind 
of a unique connector you can see there's quite   a few pins in there it's a one-way design 
and then there is this little guy right here   that spins around there's two little notches in 
there you want to make sure those are lined up   and then this is going to 
twist to lock it in place   so once you have this plugged in and 
locked this connector cannot come out Here we can tug on that all we want 
it's not going to come unplugged i'm   going to add a zip tie right here just 
for good measure and we are all done.

pexels photo 10110749

I've now got two batteries.   Each one can be removed individually. That's one of the things I didn't answer earlier   is can you run on just one 
battery and of course yes you can. And it doesn't matter which one it can be 
the one inside the frame it can be the one   outside and because this 
battery is so easy to remove If i know i'm going to go for a shorter ride i 
want the bike to be a little bit lighter more   maneuverable I can just run with the internal 
battery and then if I know i'm going to go on   a longer ride i want maximum range i want to 
make sure i'm going to make it to work and   back or a long commute that i can always put 
the second one on there whenever i need it. I do have a few of these 
batteries in stock right now. Be aware that the frame sizes this internal 
triangle area is a little bit different on the   older bikes with the black and bright colors 
versus the new gray bikes the gray bikes actually   have a little bit more room so they can use the 
larger up to 17 and a half amp hour batteries.

Whereas if you've got one of these older bikes 
about a 14 amp hour is the largest that can   fit into the frame, but again I have a few of 
these in stock right now for immediate shipping So if you've got one of these older bikes   and you need a little bit more range 
there's an option for you right now. I will also have the larger 17 and a half amp hour   batteries available for a 
pre-order starting today. Those are in stock overseas we're having 
them shipped over as quickly as possible   so hopefully they catch up to the container of 
new Lancer bikes that are already on the way. Now that you have two batteries 
installed on your bike,   it's probably twice as important 
to know how to maintain them. So if you haven't already make sure to go 
check out this video on how to maintain   lithium batteries for your electric bike..

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