Digging through some old boxes in our lab, I came across something I didn't know we still had: a Lenovo ThinkPad T570 from 2017, adorned with an IT inventory sticker from Tom's Hardware's prior corporate owner (well, before it rebranded), and a broken screen.
It has an Intel Core i5-7300U, 8GB of RAM, a 256GB SSD, and, perhaps most importantly, a hot-swappable 24 WHr lithium-ion battery. We used to use this system for display testing.
Posting my find in our Slack chat led to a ton of nostalgia (did you know you can have nostalgia for something less than a decade old? Ends up you can!).
"Removable battery?" asked monitor editor Brandon Hill. "What year is this??? "
"Dual batteries in a Thinkpad [sic], those were the days!" Linux guru Les Pounder opined.
"I miss them," Editor-in-Chief Paul Alcorn wrote. " I had a ThinkPad and carried three batteries with me to events. For like 5 years!"
They are right—— these hot-swappable batteries were awesome. But they don't need to come back.
Relegated to specialty laptops
ThinkPads weren't the only laptops with hot-swappable batteries, but they surely popularized the idea. Road warriors could keep their spreadsheets blazing by turning the laptop over, pulling two switches, popping out a battery, and plopping in a new one that would feel like part of the chassis. There were even bigger, extended batteries that jutted out to provide more longevity. A smaller battery inside the laptop would keep running while you performed the swap, so you didn't lose any work.
When Paul says he had three batteries, I know he's telling the truth because I sat next to him at trade shows where he fumbled in his bag for extended cells.
I, too, waxed nostalgic for a bit. Today, these types of batteries are largely limited to rugged laptops, like the Dell Pro Rugged line, Panasonic Toughbooks, or anything from Getac. You know, the types of laptops you'd find on a construction site or in a cop car. Years ago, I may have suggested that this type of battery was important for repairability.
But then, when I plugged in the old T570, I didn't use the ThinkPad's dedicated charger. I didn't look around to see if we had another hot-swappable battery. I used USB Type-C.
USB Type-C has made backup batteries universal
And while the rest of my team might wax nostalgic for these batteries, I don't. At the time, they made a ton of sense, but USB-C has created a ton of affordable external batteries that can be plugged into any laptop.
No, it's not as sleek to have a cable attach a portable battery to a laptop. But that portable battery can charge any laptop because they don't have proprietary shapes to fit into a specific chassis. That means that I can take my external battery and use it across multiple laptops. I can give it to friends, family, or colleagues who use different laptops. And they can charge my phone, too.
I also realized I don't need battery top-offs as often as I used to. In the last few years, chips (especially those based on ARM) have gotten far more efficient, and components like OLED screens that guzzled battery life are a bit more under control. I'll never ding anyone for giving me an option for high-capacity batteries to top off in an emergency or low-power LCD displays. But in the last few years, I've found myself scrambling to plug in less often than I used to.
Internal batteries should still be repairable
That being said, internal battery repair still matters. In fact, if any company wants to bring back the hot-swappable battery bay to thinner laptops, it should be explicitly in that effort. No one should ever have to rely exclusively on external batteries. I long for how easily the battery came out of my early 2008 white plastic MacBook without removing the rest of the case.
Every internal laptop battery should be user replaceable. Every manufacturer should sell aftermarket batteries. The USB-C batteries don't change that.
But living in 2025, it's tough for me to get nostalgic about external batteries that were proprietary to any laptop or brand. USB-C has a ton of problems, but one thing it has done right is enabled an ecosystem of batteries and chargers.
So my colleagues can look through rose-colored glasses at the past. I'm just glad I can use whatever battery I want to top off my devices.
