Best overall: Lenovo ThinkPad T580

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The Lenovo ThinkPad T580 has up to an Intel Core i7-8650U processor with a clock speed up to 1.9GHz, 32GB of DDR4 RAM, and a 1TB SATA solid-state drive (SSD) in its sturdy chassis. For a GPU, throw in an NVIDIA MX150 that will handle medium gaming duties, and enjoy everything on a 15-inch, 4K IPS display. Starting from around $870.

Bottom line: If you need a laptop with a removable battery, the ThinkPad T580 is your best bet.

One more thing: This laptop sports Power Bridge technology, which allows you to swap out a depleted unit for a charged battery without shutting down Windows.

Why the Lenovo ThinkPad T580 is the best

Lenovo's ThinkPad line has a few contenders for best laptop with a removable battery, but the T580 has the right combination of powerful hardware, great display, and affordable price to make it number one.

Choose either a 1080p or 4K resolution for the 15-inch screen, and power the graphics behind it with up to an NVIDIA MX150 with 2GB of VRAM. Don't need quite as much graphics power? Save some cash and go with the Intel UHD 620 option that comes standard with all the Intel processor configurations.

Also available is an Intel Core i7-i7-8550U processor with up to a 1.8GHz (4.0GHz boost) clock speed, up to 32GB of DDR4 RAM, and a 1TB SATA SSD. The match-on-chip fingerprint reader and anti-spoofing technologies help protect your valuable data, and the durable design makes it possible to take the notebook almost anywhere.

Best gaming: ASUS ROG Strix GL553VE

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Gaming laptops are being designed with portability and dimensions in mind, and as such removable batteries aren't usually included in the design brief. This gaming laptop from ASUS ($1,229) comes with a 7th Gen Intel Core i7-7700HQ processor, 16GB of DDR4 RAM, and a 256GB M.2 SSD backed up by a 1TB hard-disk drive (HDD). Your games will look great on the 15.6-inch, 1080p display — for a GPU you're getting an NVIDIA GTX 1050Ti with 4GB of VRAM. The durable chassis holds a host of ports, including HDMI, Ethernet, and a bunch of USB, and the keyboard is responsive and comfortable to use.

Bottom line: For a great gaming laptop with an easy-to-remove battery, check out the ASUS ROG GL553VE.

One more thing: As noted already, this laptop isn't marketed as one with a removable battery, but it is rather easy to replace with a full charge one and takes only a few minutes.

Best budget: Lenovo ThinkPad E580

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Lenovo's budget business laptop was recently refreshed with 8th Gen Intel i7 processor options, and you can also get up to 16GB of DDR4 RAM and a 512GB SSD paired with a 1TB HDD. The 15.6-inch display is available in both 768p and 1080p options, and the chassis, keyboard, and touchpad are the quality you expect from the ThinkPad line. Starting at only about $479, this is a steal of a laptop.

Bottom line: For the best budget laptop with a removable battery, check out the ThinkPad E580.

One more thing: Looking for an extra battery? Grab this 41Wh replacement for about $75.

Best business: Lenovo ThinkPad P52s

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A "mobile workstation" doesn't exactly sound portable, but the P50s does a great impression of an Ultrabook's mobility. It weighs in at about four pounds, but you're getting up to a 15.5-inch, 4K display (a 1080p touch version is also available), an Intel Core i7-8650U processor with a clock speed up to 1.9GHz, 32GB of DDR4 RAM, an NVIDIA Quadro P500 GPU, and a 1TB SSD or HDD — Lenovo also offers a speedy 16 GB Optane PCIe SSD. And included is a second internal battery for hot-swapping on the go. The comfortable ThinkPad keyboard and touchpad make an appearance, and eight ports, including HDMI, Ethernet, and USB, offer plenty of connectivity. Not bad for just over $1,000.

Bottom line: For a great business laptop with a removable battery, check out the ThinkPad P52s.

One more thing: The two batteries are actually installed in the notebook, essentially offering you two power packs for extended use.

Best overall: Lenovo ThinkPad T580

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The Lenovo ThinkPad T580 has up to an Intel Core i7-8650U processor with a clock speed up to 1.9GHz, 32GB of DDR4 RAM, and a 1TB SATA solid-state drive (SSD) in its sturdy chassis. For a GPU, throw in an NVIDIA MX150 that will handle medium gaming duties, and enjoy everything on a 15-inch, 4K IPS display. Starting from around $870.

Bottom line: If you need a laptop with a removable battery, the ThinkPad T580 is your best bet.

One more thing: This laptop sports Power Bridge technology, which allows you to swap out a depleted unit for a charged battery without shutting down Windows.

Updated May 21, 2018: We updated this guide to offer you only the best laptops with removable and easy-to-access batteries.