In this video, I’ll take you through the entire process of doubling the battery capacity of my Lenovo Legion Go handheld. While the Legion Go is an excellent device with its large screen and detachable joysticks, one of the main drawbacks is the relatively small battery life when running demanding AAA titles.

I decided to tackle this problem by upgrading the internal battery—a modification that requires sourcing rare parts, custom design work, and some hands-on technical skills. This video covers everything from researching and finding the correct battery cells to disassembling the device, designing a custom back cover, and finally, testing the improved performance.

What You'll Learn:
Identifying the Right Battery: How I sourced rare, custom-made cells to match the original battery specifications.
Disassembly & Modification: Step-by-step instructions on how to safely disassemble the Legion Go and free up internal space for the larger battery.
Custom Back Cover Design: How I designed and 3D-printed a custom back cover to accommodate the new battery using specialized 3D software.
Testing Results: Performance improvements, including a battery life boost from 1.5 hours to nearly 4 hours while running Cyberpunk 2077.
Challenges and Considerations: Issues with the device’s BMS and BIOS not fully recognizing the new capacity, but still offering double the playtime after the percentage drops to 7%.
If you’re interested in modding or just want to extend your handheld’s battery life, this video is for you!

NOTE: Avoid to discharge handheld to ZERO and leave USB connected to peripherals, otherwise you will have to disassemble back cover, remove cable connector from motherboard, start the unit, then connect cable while handheld is ON. Be extra careful not to damage battery cables, those have very gentle insulation.

As always, STL for free: [ Ссылка ]

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