Yeah, Apple's M1 MacBook Pro is powerful, but it's the battery life that will blow you away | TechCrunch
Even after 12 years, my late 2008 MacBook Pro hasn't given up. Upgraded it to 8GB of ram, added an SSD, and patched it with MacOS Catalina. Still use it everyday. :
Determine battery cycle count for Mac notebooks - Apple Support
New Genuine OEM A1383 Battery for Apple MacBook Pro 17" A1297 Early/Late 2011 | eBay
How to Boot MacBook Pro Without a Battery (Older Models 2006 – 2011) | OSXDaily
Differences Between 17-Inch MacBook Pro, Early 2008/2009: EveryMac.com
Dantona Lithium-Polymer Battery for Apple® MacBook® Pro 17" Laptops NM-A1189 - Best Buy
BATTERY LIGHT INDICATOR SLEEP BOARD - Apple MacBook Unibody 13" A1278 Late 2008 | eBay
NewerTech NuPower 58 Wt-Hr Replacement Battery | Apple MacBook Pro 15 inch