Guarantee the fit for your E-Scooter
Here at project lithium we make battery packs to order,
making sure the battery pack is perfect for you.
We take your existing battery casing, and put new batteries
inside to the exact or better specifications of the original battery.
Reduce waste, and guarantee the fit!
Reliability for your E-Bike
The last thing you want is to find is that the new battery you
purchased has the wrong capacity, or a sketchy power connector.
By tailoring a battery to you we can make sure we get the right
capacity and current to not damage your product/custom project.
Make your E-Bike last a long time!
On a budget, use recycled cells
Normally assembling batteries to order is expensive, but using recycled cells from us you usually save around 30% compared to new.
We re-use what we can from your existing battery i.e. controller (BMS), and case to help save you money.
All lithium batteries are expensive, but we try to make as cheap as possible. Make sure to compare prices, we may not be cheapest for all projects, so we have our handy price calculator further down the page and here!
Make sure to send us a message if you are unsure about exactly what cells you need, not all batteries are equal.
Local in Auckland, New Zealand
We are a small local business based in Auckland, New Zealand so we can give you faster lead time and cheaper shipping costs.
18650 Cells
18650 Batteries are the industry standard for battery packs for e-scooters and e-bikes as well as DIY projects.
They are cost effective, easy to work with, and the smallest cell we offer. We offer both new and recycled cells at 2 different capacities.
2000 mAh Recycled
Tested to 1900 mAh
$8/cell
20 A Max Current per Cell
LGAAHD2C1865 Cell
Recycled 2000 mAh
3000 mAh Recycled
Tested to 2900 mAh
$10/cell
10 A Max Current per Cell
NCR18650BD
Recycled 3000 mAh
3000 mAh New
3200 mAh Rated Capacity
$15/cell
10 A Max Current per Cell
NCR18650BD
New 3200 mAh
21700 Cells
21700 Batteries are higher capacity, can supply a much higher current, are more modern, but more expensive. These cells are commonly used in e-skateboards. We currently only offer these cells brand new, and are currently working on sourcing them second hand.
4000 mAh New
Samsung 21700 40T
$19/cell
35 A Max Current per Cell
INR-21700-40T
New 4000 mAh
4200 mAh New
Molicel 21700 P42A
$21/cell
45 A Max Current per Cell
INR-21700-P42A
New 4200 mAh
FAQ
My Battery Is Not Charging
This can mean one of the following things:
- Your charger might be faulty
- Your bms might have be faulty
- Your battery is undercharged that caused the bms to go into sleep mode
- Your cells are dead
My Battery Is Not Discharging
This might mean one of the following things:
- A fuse has blown
- The bms has a fault
- The cells have died
- The device is drawing too much power
My Battery Is Heating up
The battery heating can be normal as long as it’s within the normal range.
One of the following can be the cause:
- High power draw
- Fast charging
My Battery Is Cutting Out
This has two main reasons why this is happening.
- Over heating
- Too much draw
- A bms balance lead disconnected
If this is recurring issue there might be an issue with the bms or device
My Battery Is Not Lasting as Long
This could mean that the cells are degraded and might need replacing soon.
How do I know if my Battery Needs a Repack
If your battery is lasting about half as long as it did when it was new this is the most common sign that you need a repack.
Are Recycled Cells Ok to Use
We make sure all recycled cells we sell are fully working.
But if you want to make your own battery there is no problem using recycled / second hand cells, there are just a few rules to follow.
- Test Test Test, make sure you know the cell’s capacity
- Don’t mix cell types
- Make sure the cell capacity does not vary too much between cells.
What is the Difference Between 18650 and 21700 Cells
The numbers actually are just defining the cell’s dimensions
18650 cells are 18mm x 65mm
21700 cells are 21mm x 70mm
Some other differences are 21700 cells usually have more power and both higher capacity and current ratings.
Pricing Estimator
Quickly get a cost estimation for your project. These prices are not final, but are a great starting point to help you decide on what works best for you. You can also contact us below if you are unsure about what cells you need.
Price includes labor and all material costs.
| Cell Capacity (Type) | Price with Recycled Cells* | Price with New Cells | Cells Max Amps | Configuration’s Capacity |
|---|---|---|---|---|
| 3000 mAh (NCR18650BD) | $ – | $ – | – A | – mAh |
| 2000 mAh (LGAAHD2C1865) | $ – | Not Currently Available | – A | – mAh |
| 4200 mAh (INR21700-P42A) | Not Currently Available | $ – | – A | – mAh |
* Recycled cells are verified to a varience of +/-100mAh of rated capacity
Ask Us
Haven’t found the answers you were looking for yet?
Drop us a message using the form below. We are always up for a chat, ready to answer your questions, and excited to help bring your custom pack to life.
No obligations, we are happy to answer any questions to help you with your project!