Nvidia has started pushing out a new update to its Shield and Shield K1 tablets. Listed as 'software upgrade 5.2', the update brings along a handful of changes, including improved compatibility with non-standard chargers. Other changes include GPS crash-related fixes as well as stability and security-related optimizations. The Android Security Patch Level has also been bumped to April 1. As is usually the case with OTA roll outs, it may take some time for the update to hit your device. Source 1 2 | Via
Source: http://www.gsmarena.com/nvidia_shield_new_update_charger_compatibility-news-25360.php