My original Dell power adapter (PA-1131-02D) failed in a nearly spectacular way. Normally outputting 19.5 V DC, something broke inside and it started to output 50 V AC. The laptop must have an internal circuit breaker because the battery symbol started flashing orange and green, and the computer started to operate erratically.The replacement power adapter (branded "Dekcell") arrived within the predicted delivery period and has operated well since then (1 month). The Dekcell adapter is always cool, where the old Dell adapter was always extremely hot in operation.Dekcell Model ST-C-150-19500670CT. Output 19.5V DC, 6.7 Amps.