Indian modder upgrades Asus ROG Ally with 90Wh battery, but here's why you probably shouldn't do it

It is no surprise that ROG Ally users around the globe are committed to extending battery life in their handheld gaming PCs. Recently, a Reddit user installed an 80Wh battery in an Asus ROG Ally running SteamOS and reported improved backup times. Now, an Indian YouTube channel, Miner TechTips, has taken it a step further by fitting a 90Wh battery into the device.

Firstly, they sourced a 90Wh C41N2013 battery from an Asus ROG Strix G15 laptop, then carefully disassembled it to access and reconfigure the cells. To fit the large battery into the ROG Ally’s chassis, they re-folded the cells into a compact stack and insulated them with Kapton tape to prevent heat transfer and short circuits.

They replaced the original SSD with a 2TB Kingston KC3000 using a trimmed 90° M.2 adapter, insulating it with Kapton tape. To fit the larger battery, they 3D-printed a custom backplate and tray, which they claim took 19 hours and, according to them, resulted in a thicker but more ergonomic design.

They installed the SSD, the 90 Wh battery, and the custom backplate, then replaced Windows with SteamOS. According to them, the modded Ally now runs at 15–20 W for AAA games, delivering 3.5 to 4 hours of playtime, and at 7–10 W for indie titles, offering 7 to 8 hours. Charging takes about 2 hours and 10 minutes, and while the device is roughly 200 g heavier, they consider it far more practical.

The gains may sound tempting, but the person who originally performed this mod does not advise doing it. Recently on Reddit, a user named u/Talaxin shared a one-month update on the same 90Wh ROG Ally mod. Under the same post, u/Kira980, the original creator of the mod, advised against folding the battery, stating that it is more dangerous than other available battery mods.

Nevertheless, you can check out the Miner TechTips video below to see whether this ROG Ally mod is something you'd be interested in, as they do a great job of explaining each and every step in detail. The video is in Hindi, so consider enabling subtitles or auto-translating the audio to English, or your preferred language, for easier understanding.