Walmart offers the Camillus Nimble II 6.5" Titanium Folding Knife and Survival Tool for $6.80. Opt for in-store pickup to dodge the $5.99 shipping fee. That's $3 off and the lowest price we could find. The knife features a 2.8" titanium bonded stainless steel blade, and the survival tool features a flashlight, thermometer, magnifying glass, signal mirror, compass, and whistle.
You very likely are putting your laptop battery into an early grave.