facelessloser on Twitter: "Not surprising but adding a 9 cell battery to my thinkpad x220 made it quite a bit heavier. Hope its better battery life then my old aging battery #ThinkPadX220 #
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X220 2520m, 16gb ddr3 1866mhz, 500gb ssd, 9 cell, and new ips panel : r/thinkpad
Record Breaker: Lenovo ThinkPad X220 Lasts Over 20 Hours | Laptop Mag