Update README.md

kresp0 · Jan 16, 2024 · 60c03f7 · 60c03f7
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@@ -31,7 +31,7 @@ Not tested (yet) but it should work:
 * [insideGadget's MBC3 RTC LinkNLoad USB Flash Cart](https://shop.insidegadgets.com/product/gameboy-mbc3-rtc-linknload-usb-flash-cart-works-with-pokemon-games-hacks-like-cc/) 
 * other flashcarts with MBC3 support **and RTC**.
 
-I'm powering it with a USB to 3.5mm barrel jack cable **with the polarity reversed**, connected to an old phone charger.
+I'm powering it with a USB to 3.5mm barrel jack cable **with the polarity reversed** (center negative), connected to an old phone charger.
 
 ## Instructions