Found a T500 in my "Lithium Battery Donations" box. Good physical shape (needs a deep cleaning). Looks like a SIM slot too? Is this worth restoring for the kids' ChromeOS Flex machine?
Visit to Buy] 7800mAh Battery for IBM Lenovo ThinkPad R60 R60e R61 R61e R61i T60 T60p T61 T61p R500 T500 W500 SL400 SL50… | Lenovo, Laptop battery, Lenovo thinkpad
T500 W500 R500 9 Cell Battery for IBM Lenovo ThinkPad T61 T61p T60 R61 R61i R60 - Walmart.com
Amazon.com: LQM® 10.8V 7800mAh New 40Y6797 Laptop Battery for Lenovo IBM ThinkPad T60 R60 R500 W500 T500 SL300 SL400 SL500 40Y6795 42T4619 42T4620 92P1133 : Electronics
New Original Laptop for IBM Lenovo ThinkPad T500 W500 C Cover Palmrest with Touchpad Key and Cable 1set 42X4768 44C0664 - AliExpress