HUNK is playable in the Mercenaries minigame in Resident Evil 4, but has no relation to the story. HUNK appears as a side character in Resident Evil: Operation Raccoon City, where he works with other Umbrella Security Service operatives to recover a sample of the G-virus prior to the events of Resident Evil 2. He is also a playable character in Resident Evil: The Mercenaries 3D and Resident Evil Revelations.
Nowadays most laptops has a battery life of about 4 hours. Old ones bought in the 2000~2004 Last about 2 hours.
For example, if you have a laptop that originally offered eight hour battery life but is now down to four hours, you may not necessarily want to replace the battery. If that four hours is good enough for you, you may want to save your money and put it toward buying a new laptop in the future.