Best battery life: Laptops that last 7-plus hours
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Lenovo ThinkPad T420 Battery
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Upgraded the twins today. T420 got 16gb ram and a sled battery. 9cell + sled = 17hrs battery life. T480 got an extra 16gb of ram, up to 32gb. Happy with the
Lenovo ThinkPad T420 4236 Battery Replacement | LenovoBatt.com
Lenovo IBM ThinkPad T420 9 cell Extended Life Replacement Battery
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Lenovo ThinkPad T420s, T420 And T520: Up To 30hrs Battery Life - SlashGear
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LENOVO ThinkPad T420s Series computer batteries, Laptop Battery - YouTube
Lenovo ThinkPad T420S 4176 Battery Replacement | LenovoBatt.com
Lenovo ThinkPad T420s Review | Digital Trends
