Ninebot Max G2 battery upgrade: 80 km range, 50 km/h speed. Looks fully stock!

You can ride all day — across the city or even to the next one. I guarantee you’ll get tired before the scooter does.

The whole idea is pretty simple. Inside the deck of the scooter, there’s a lot of unused space. So I designed a custom battery that fits the shape of the deck almost perfectly and fills up all that space — that’s how we get 2.5 times more capacity.

The upgrade takes less than 30 minutes and only needs a couple of hex keys and screwdrivers. And the best part? The scooter still looks totally stock. Nothing sticks out or grabs attention.

I’ll walk you through how to build this battery yourself. I’ll share all the 3D models for printing, and take you step-by-step through the whole process right here in my workshop — so you can make one too, enjoying the process and saving a bunch of money along the way.

And at the end, we’ll compare the final result with some other popular scooters, so you’ll know exactly which option works best for you.

Sounds good? Then grab a drink and let’s go!

Useful links:

36V battery STL - https://www.thingiverse.com/thing:7030089
48V battery STL - https://www.thingiverse.com/thing:7030105

Ninebot Max G2 flashing tutorial - https://youtu.be/DEfTfyc0uVo

ScooterHacking website - https://scooterhacking.org
ScooterHacking telegram group - https://t.me/scooterhackingchat

XiaoDash website - https://www.xiaodash.app
XiaoDash telegram group - https://t.me/XiaoDash

Xiaomi electric scooters battery upgrade tutorial - https://e-scooters.embedden.com/blog/custom-extended-battery-for-xiaomi-m365-1s-essential-mi3/

Silicone - https://aliexpress.com/item/4001018608057.html
Insulation rings - https://aliexpress.com/item/1005005190754534.html
21700 cells - https://www.nkon.nl/en/rechargeable/li-ion/21700-20700-size.html

48V battery charger (aliexpress) - https://aliexpress.com/item/32836628670.html
48V battery charger (my store) - https://e-scooters.embedden.com/shop/accessories/48v-4a-charger/

Smart BMS - https://e-scooters.embedden.com/shop/smart-bms/happy-bms-for-ninebot-max-g30-g2/

Ready-made 48V battery - https://e-scooters.embedden.com/shop/internal-batteries-for-ninebot-max-g2/48v-28ah-internal-battery-for-ninebot-max-g2/
Ready-made 36V battery - https://e-scooters.embedden.com/shop/internal-batteries-for-ninebot-max-g2/36v-38ah-internal-battery-for-ninebot-max-g2/

Join my telegram group - https://t.me/m365_custom_electronics_en

00:00 Teaser
01:41 Introduction
02:49 The Upgrade Idea
05:13 Range Test: New 36V Battery
07:02 80 Kilometers? Seriously?
08:20 How to Make It Faster. Step 1 – Flashing the Controller
09:44 How to Make It Faster. Step 2 – Higher Voltage
10:59 Speed Test: New 48V Battery
12:33 36V or 48V Battery? Should You Flash the Scooter?
15:29 Is It Really Worth It?
17:09 Want to Upgrade Your Scooter? Here’s What to Do.
17:58 Measuring the Deck & Designing the Battery
20:51 Battery Case 3D-printing
22:16 Cells Buying and Installation
25:13 Welding of the Cells
30:32 Battery Management System (BMS). Theory part
35:35 Battery Management System (BMS). Installation
45:04 Powering Up the Battery
46:07 Battery Configuration
48:08 Final Assembly
56:49 What about the 48V battery?
59:06 Installing the New Battery
1:04:08 What’s the Price?
1:07:39 Pick the Best Upgrade
1:10:29 Lightweight Alternative - Xiaomi Scooters
1:12:41 Final Words