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Xbox controllers still use AA batteries because of a long-standing agreement with Duracell | TechSpot
How to check the battery level of your Xbox One controller on Windows 10 | by Dave W Shanahan | Medium
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1800mAh Rechargeable Battery Pack for Xbox One Controller. 2 Lithium Long Life Batteries compatible with Xbox One/Xbox One S/Xbox One X/Xbox One Elite Controller. Play and Charge Kit - Walmart.com
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UPDATE] Xbox controllers still use AA batteries because of a long-running marketing deal | TheSixthAxis
![Xbox and Duracell have "a constant agreement" regarding controllers and batteries, the battery company claims - Stealth Optional Xbox and Duracell have "a constant agreement" regarding controllers and batteries, the battery company claims - Stealth Optional](https://stealthoptional.com/wp-content/uploads/2021/01/why-does-xbox-controller-still-use-AA-batteries.jpg)