A long battery life laptop lets you study all morning, sit through meetings all afternoon, and still have charge left for the evening without hunting for an outlet. That runtime does not come from a single advertised figure. It comes from four factors added together: battery capacity in Wh, an energy-efficient chip, the display type, and the weight of the body. This article walks through five 2025 long battery life laptops that are still in stock, use Lunar Lake or Ryzen AI 300 chips, and start at 22.5 million VND, with the source of every figure noted so you can check it yourself before you buy.
The Dell XPS 13 9350 is a long battery life laptop weighing about 1.2 kg
The starting point for any 2025 long battery life laptop is the chip. The Core Ultra 200V series, codenamed Lunar Lake, was designed by Intel specifically for thin and light laptops. The two versions of the Dell XPS 13 9350, with the Core Ultra 5 226V and Core Ultra 7 256V, have 8 cores and 8 threads and a 17W TDP according to the Notebookcheck reference table, plus LPDDR5X memory placed right on the chip package to shorten the data path. The low baseline power draw lets the laptop last all day when you are writing documents, browsing the web, or joining online meetings, the tasks that take up most of a student's or office worker's time.
According to the product page, the XPS 13 9350 uses a 55 Wh battery and weighs 1.18 to 1.22 kg, and all three variants currently on sale come with an FHD+ display. The same page lists a maximum of 26 hours for the FHD+ version, while the Q&A section below it estimates about 13 hours of basic office work and 6 to 7 hours when running heavy applications. That gap is normal: the big number is usually measured during video playback at low brightness, while the small one is closer to a real working day. With a long battery life laptop like this, you should plan around the 13-hour mark.
If you want a compact body that fits in a crossbody bag, the DELL XPS 13 9350 (2025) configuration page offers three options: Core Ultra 5 226V, 16GB, 512GB at 31.5 million; Core Ultra 7 256V, 16GB, 512GB at 35.5 million; and Core Ultra 9 288V, 32GB, 512GB at 50.5 million. For all-day battery life, the 226V or 256V version makes more sense, because the Core Ultra 9 288V has a 30W TDP in the same reference table, nearly double, in exchange for performance that studying and office work rarely call for.
ThinkPad X1 Carbon Gen 13 and why the WUXGA display is the one to pick
The ThinkPad X1 Carbon Gen 13 is a long battery life laptop for people who travel for work often, and all three variants currently on sale use the Core Ultra 7 258V from the Lunar Lake family with 32GB of RAM. The PSREF spec sheet for the ThinkPad X1 Carbon Gen 13 lists a 57 Wh battery with Rapid Charge support, charging to 80% in about an hour, and a starting weight of 986 g for the V-series chip version. The product page, however, lists 1.12 kg. The real figure depends on the display and component configuration, but both put it among the lightest 14-inch laptops.
The detail that decides battery life on this model is the display. With the same 258V chip, Lenovo sells a WUXGA touchscreen version and a 2.8K OLED version. A high-resolution screen has to drive more pixels, and an OLED panel uses more power when showing a white background such as a text page or spreadsheet. So if you need a long battery life laptop for typing documents all day, the WUXGA version lasts longer on a charge and also costs less. The product page lists up to 13 hours, while the Q&A section cites NotebookCheck at 8 to 10 hours with light tasks.
The price gap between the two display types is considerable. On the Lenovo ThinkPad X1 Carbon Gen 13 (2025) page, the Core Ultra 7 258V, 32GB, 512GB version with the WUXGA touchscreen costs 40.5 million, the same configuration with a 2.8K OLED goes up to 63.99 million, and the 1TB OLED version is 67.99 million. A difference of more than 23 million VND is enough to buy a portable charger and an external monitor for your desk, while the WUXGA version still holds a charge better all day on the move.
The HP OmniBook X Flip 14 lets you choose Lunar Lake or Ryzen AI
HP OmniBook X Flip Next Gen AI 14 is the only 360-degree convertible long battery life laptop on the list, weighing 1.39 kg and measuring 14.7 mm thick according to the product page, with a 400-nit 2K touchscreen covered in Gorilla Glass 3. What sets this model apart is that the same body is sold with both Intel and AMD chips, so you can directly compare two approaches to saving power without changing the design, keyboard, or screen size.
| Variant | Chip | Cores/threads | Default TDP | Graphics | Price |
|---|---|---|---|---|---|
| Ryzen AI 5 340 / 16GB / 512GB | Zen 5 (Krackan Point) | 6/12 | 28W (AMD) | Radeon 840M | 22.5 million |
| Core Ultra 5 226V / 16GB / 512GB | Lunar Lake | 8/8 | 17W (Notebookcheck) | Arc 130V | 23.5 million |
| Core Ultra 7 256V / 16GB / 1TB | Lunar Lake | 8/8 | 17W (Notebookcheck) | Arc 140V | 28.5 million |
The two Intel versions use the Core Ultra 5 226V and Core Ultra 7 256V from the Lunar Lake family, both with 8 cores, 8 threads, and a 17W TDP. The AMD version uses the Zen 5 Ryzen AI 5 340, and the AMD Ryzen AI 5 340 spec page lists the chip as having 3 Zen 5 cores plus 3 Zen 5c cores, 12 threads, a default TDP of 28W, and a configurable range of 15 to 54W. For light study tasks, the lower TDP favors the Intel version if you need long battery life, while the AMD version has a slight edge in thread count when you need to compress files or compile source code.
The product page cites HP's figures of about 14 hours 15 minutes for basic office work and 19 hours 30 minutes for video playback, while the page's own pros and cons section estimates a real-world 7 to 8 hours, and the page does not list the battery capacity in Wh. If you want a convertible for taking handwritten notes in class, the HP OmniBook X Flip Next Gen AI 14 (2025) page lists 22.5 million for the Ryzen AI 5 340 version, 23.5 million for the 226V version, and 28.5 million for the 256V version with a 1TB SSD.
The Galaxy Book5 Pro 16 packs a 76.1 Wh battery for people who need a big screen
When a 14-inch screen feels too cramped for a spreadsheet with many columns or two windows side by side, the Samsung Galaxy Book5 Pro 16 is worth considering among large-format long battery life laptops. The product page lists a 76.1 Wh battery, the largest of the five models in this article, in a body only 12.5 mm thick and weighing 1.56 kg. The large battery offsets the 16-inch panel, which draws more power than a 14-inch one, so this model still lasts all day despite a noticeably larger display area.
The configuration on sale is the Core Ultra 7 256V from the Lunar Lake family, 16GB of RAM, a 1TB SSD, and a 3K Dynamic AMOLED 2X display. The product page lists up to 25 hours, while the page's own Q&A section estimates about 15 to 18 hours for office work and coding. Even the lower figure is enough for a full day of classes from morning to night. An AMOLED screen displays black by turning pixels off, so enabling dark mode in Windows and your apps can stretch battery life even further.
One thing to weigh is that the 16GB of RAM sits on the chip package and cannot be upgraded later, and the 3K display only pays off when you view photos and videos or do 2D graphics work. If you need a big screen to study interface design or to split the screen while reviewing for exams, the Samsung Galaxy Book5 Pro 16 (2025) page has a Core Ultra 7 256V, 16GB, 1TB version at 34.99 million. Compared with the XPS 13 9350 256V version at 35.5 million, you carry about 0.35 kg more in exchange for a 16-inch screen and a battery that is 21 Wh larger.
The Dell 14 Plus DB14250 is a long battery life laptop in the 27 million price range
With a budget around 27 million VND, the Dell 14 Plus DB14250 is the long battery life laptop with the most chip options in this article. The product page lists an aluminum chassis, a weight of 1.55 kg, a 4-cell 64 Wh battery, 65W charging over a USB-C port, and up to 22 hours of local video playback. It is slightly heavier than the XPS 13 9350, but in return it has 9 Wh more capacity for longer battery life, a difference that matters for students who need to last all day in the library.
One discrepancy in the figures is worth noting. The Q&A section on the product page itself cites a NotebookCheck review of a 54 Wh battery version, which reached about 10 hours of light office work and 7 to 8 hours of multitasking, and in one place lists a weight of about 1.6 kg. The two sets of numbers may differ because this line offers several battery options. Before you decide, ask about the battery capacity printed on the label of the exact variant you choose, rather than assuming the 64 Wh figure.
The three variants on sale on the DELL 14 Plus DB14250 (2025) page are the Core Ultra 7 256V, 16GB, 512GB with a 2.5K display at 26.9 million; the Ryzen AI 7 PRO 350 with 16GB and 1TB and an FHD+ display at 27 million (model DB14255); and the Core Ultra 9 288V, 32GB, 1TB with a 2.5K display at 34 million. If all-day battery life is your priority, the 256V version brings the 17W Lunar Lake chip, while the Ryzen AI 7 PRO 350 has 8 cores and 16 threads with a 28W TDP according to the reference table, which suits you when you need many processing threads and a 1TB SSD.
Comparison of Wh, weight, and price to settle on a long battery life laptop
When you put the five models side by side, one useful metric is Wh per kilogram, which shows how much energy you carry for each portion of weight on your shoulder. The ThinkPad X1 Carbon Gen 13 reaches about 58 Wh/kg using the PSREF figure of 986 g, the Galaxy Book5 Pro 16 about 49 Wh/kg, the XPS 13 9350 about 46 Wh/kg, and the Dell 14 Plus about 41 Wh/kg. HP has not published the Wh figure for the OmniBook X Flip 14 on its page, so it cannot be calculated.
| Model | Chip on sale | Battery (source) | Weight (source) | Starting price |
|---|---|---|---|---|
| Dell XPS 13 9350 | Core Ultra 5 226V, 7 256V, 9 288V | 55 Wh (product page) | 1.18 to 1.22 kg (product page) | 31.5 million |
| ThinkPad X1 Carbon Gen 13 | Core Ultra 7 258V | 57 Wh (PSREF) | From 986 g (PSREF), 1.12 kg (product page) | 40.5 million |
| HP OmniBook X Flip 14 | Core Ultra 5 226V, 7 256V, Ryzen AI 5 340 | Not listed on the page | 1.39 kg (product page) | 22.5 million |
| Galaxy Book5 Pro 16 | Core Ultra 7 256V | 76.1 Wh (product page) | 1.56 kg (product page) | 34.99 million |
| Dell 14 Plus DB14250 | Core Ultra 7 256V, 9 288V, Ryzen AI 7 PRO 350 | 64 Wh (product page, confirm with seller) | 1.55 kg (product page) | 26.9 million |
The table shows that no model wins on every criterion. If you walk a lot and carry your laptop all day, the X1 Carbon Gen 13 or the XPS 13 9350 are the lightest long battery life laptops. If you sit in one place for long stretches and need a big screen, the Galaxy Book5 Pro 16 has the largest battery. If your budget is under 30 million, the OmniBook X Flip 14 and Dell 14 Plus are two sensible entry points, and both have Lunar Lake versions that last all day on office tasks.
Whichever model you choose, usage habits still determine most of the real-world runtime. Keeping screen brightness around half, turning on Windows battery saver mode when studying in class, and closing browser tabs that play background video will bring a long battery life laptop closer to its published figure. Snapdragon X machines also aim for long runtimes but come with the problem of software compatibility on ARM, so this article sticks to five x86 models so you can install your study software without worrying about an emulator.
Frequently asked questions when buying a long battery life laptop
How many Wh is enough for a day of study and work? With a Core Ultra 200V chip and an FHD+ or WUXGA display, 55 to 64 Wh, as on the XPS 13 9350 or Dell 14 Plus DB14250, is usually enough for all-day study and office work at moderate brightness. A high-resolution 16-inch screen needs a bigger battery, like the 76.1 Wh one in the Galaxy Book5 Pro 16.
Should I choose Core Ultra 200V or Ryzen AI 300 if runtime is my priority? Among the models in this article, the Core Ultra 200V chips in the 226V, 256V, and 258V versions have a 17W TDP, lower than the 28W of the Ryzen AI 5 340 and Ryzen AI 7 PRO 350. If long battery life is the priority, the Intel version is the safer choice, while the AMD version suits you when you need many processing threads.
Does an OLED display reduce battery life? OLED uses more power when showing bright backgrounds such as text and spreadsheets, but saves power when showing dark backgrounds. If you need all-day battery life for typing documents, an IPS display like the WUXGA version of the ThinkPad X1 Carbon Gen 13 lasts longer on a charge, and it costs 23 million VND less.
Can I trust the battery life figures manufacturers publish? Published figures are usually measured during video playback at low brightness. The XPS 13 9350 page lists a maximum of 26 hours but estimates about 13 hours of basic office work. When choosing a long battery life laptop, take the lower figure as your benchmark for planning charges.
