Lenovo Thinkpad X230 – Part 1, BIOS flash – VaiPui
Lenovo ThinkPad X230 Battery 44+
X230 unsupported Battery - Thinkpads Forum
KIANMENG.ORG: Replacing Thinkpad X230 Battery
X230 SSD Upgrade, Now my power consumption under Linux(Debian) is so great... (6w idle and 7-9w on normal office workload) I might use this little laptop for 5 more years to come :
Improve Power Usage / Battery Life In Linux With TLP ~ Web Upd8: Ubuntu / Linux blog