I have a Dell Inspiron 3521 (with Intel Graphics 4000) which is bundled with a 65 watt adapter. I have another adapter of 90 watt with myself.
Is it safe to use 90 watt with my Dell 3521 laptop ? Or are there any risks ?
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As long as your 90W power adapter is an original Dell or a Dell compatible third party product you can use it.In fact you could even connect a 130W or 240W adapter to your system.So don't throw it away.