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How to Separate Batteries, Good from Bad

A simple method to test any alkaline battery in seconds! Works on AA, AAA, C, D batteries.

You can separate good from bad.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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