Internal battery is easy to fit and would really give the machine long legs if that's what you were after. Battery health is 90% or so.
40A00000WW Lenovo Basic ThinkPad Dock - Lenovo ThinkPad T440 Laptop Dock
40A00000WW Lenovo Basic ThinkPad Dock - Lenovo ThinkPad T440 - 40A00000WW (Lapt
FSKE 65W 20V 3.25A Laptop Charger Compatible with Lenovo Thinkpad T440 T440S T450 T460 E531 E570 T460S T560 Lenovo Flex 2 Flex 3 Yoga 11 11S Z50-70 Z50-75 ADLX65NLC2A ADLX65NCC3A Power Adapter
K KYUER High Capacity 72Wh 68+ 0C52862 0C52861 Laptop Battery for Lenovo ThinkPad T440 T440s T450 T450s T460 T460p T470p T550 T560 X240 X250 X260 X270 W550 W550s L450 L460 L470 P50s 45N1126 45N1127
Laptop Battery for Lenovo ThinkPad T440 T440s T450 T450s T460 T460p T470p T550 T560 X240 X250 X260 X270 W550 W550s L450 L460 L470 P50s 0C52861 45N1126 45N1127 45N1128
