Lenovo Legion Charger Replacement: One Plug, Just Pick the Right Wattage
XiongYing Zeng
Here's some good news if you've been dreading this. Replacing a Legion charger is simpler than replacing one for an Acer or an ASUS ROG, and it comes down to a single fact: every modern Legion uses the same plug. There's no round-versus-rectangular guessing game. The connector is settled, so really there's only one decision left — the wattage.
That plug is Lenovo's yellow rectangular Slim Tip, and it hides a clever little trick that's worth understanding before you buy, because it's the reason a too-small adapter will flat-out refuse to work. We'll get to that, then map the Legion and Legion Pro models to their wattage tiers. As always, the model names are a guide; the label on your old power brick is the final word.
One wording note: brand and model names below describe compatibility. These are compatible replacement adapters built to the original (OEM) specification, not power supplies sold by or affiliated with Lenovo.
The Slim Tip, and the resistor that's watching you
Lenovo's Slim Tip is a flat, rectangular yellow connector — roughly 11 × 5mm — and it's used across the whole modern Lenovo range, not just Legion. The same plug shows up on ThinkPad workstations and various IdeaPads. That's handy: a Legion adapter and a ThinkPad P-series adapter often interchange, as long as the wattage is enough.
But the Slim Tip isn't just a shape. Inside it there are three contacts — positive, negative, and a center pin — and that center pin connects to a resistor whose value encodes the adapter's wattage. Your Legion reads that resistor the moment you plug in. If the adapter doesn't report enough power for the machine, the laptop can simply refuse to run or charge from it. This isn't a fault; it's Lenovo's way of stopping you from starving a gaming laptop.
This is why "it fit but it won't charge" happens. The plug is universal across Legion, so a lower-wattage Slim Tip adapter physically slots in perfectly — and then the laptop reads the resistor, sees it's underpowered, and declines. One owner tried a 135W in place of a 230W and it did nothing at all. The shape matching isn't the same as the wattage matching.
Legion wattage tiers (all 20V, all Slim Tip)
Every Legion adapter runs at 20V — the wattage difference is all in the amperage. Here's how the tiers fall, with the ADL-series part numbers you'll find printed on the brick.
| Wattage | Output | Common OEM part numbers | Typical machines |
|---|---|---|---|
| 230W | 20V / 11.5A | ADL230SDC3A, ADL230NLC3A | Earlier Legion 5 / 7, Y-series (Y7000P, Y540, Y740), ThinkPad P-series |
| 245W | 20V / 12.25A | ADL245SDC3A, ADL245SLC3A | Some newer Legion / LOQ builds |
| 300W | 20V / 15A | ADL300SDC3A, ADL300SLC3A | Legion 5 / 5 Pro / 7, R9000P, R9000K, Y9000K, Y9000X |
| 330W | 20V / 16.5A | ADL330SDC3A, GX21M50608 | Legion Pro 7 / 9, Y9000P, Y7000P (2023), 16IRX8 / 16IRX9 |
A wrinkle worth knowing: the same model name can ship with different bricks. Plenty of Legion 5 (15ACH6H) owners find some units came with 230W and others with 300W, identical specs otherwise. So don't trust the model name alone — read your label, or check which wattage Lenovo lists for your exact machine type.
Going up is safe. Going down is what fails.
Because the Slim Tip and the 20V output are constant across the range, matching a Legion charger is genuinely just a wattage exercise. A 300W adapter runs a machine that shipped with 230W without issue — the laptop pulls only what it needs, and the resistor reads "plenty of power, go ahead." A 330W covers 300W and 230W below it. Lenovo's own forum staff confirm a 300W on a 230W Legion 5 is completely fine.
The other direction is where people get stuck. Drop below what your machine expects and you hit the resistor check — best case it maintains the battery at idle but won't charge during use, worst case it does nothing. When in doubt, match the wattage on your original brick, or step up.
Find your compatible Legion charger
- 330W Slim Tip (20V / 16.5A) for Legion Pro / Y9000P / Y7000P / R9000P — view the 330W GaN adapter →
- Browse the full range of compatible laptop chargers — see all chargers →
👉 The 330W GaN adapter is a smart pick even if your Legion shipped with 230W or 300W, since it covers those tiers too and the gallium-nitride build runs cooler and packs smaller than the old standard brick. Check the wattage on your old Slim Tip charger, then view the adapter here →.
What a good Legion adapter should have
A 300W or 330W brick delivers a lot of power across that Slim Tip for hours at a stretch, so the protection circuitry matters. Look for over-voltage, over-current, short-circuit, and over-temperature protection, and CE, FCC, and RoHS certification. A GaN (gallium-nitride) unit is a bonus here — it tends to run cooler and comes in a noticeably smaller, lighter package than the chunky stock 300W, which is the exact thing Legion owners complain about lugging to class or the office.
FAQ
Can I use a 230W charger on a Legion that needs 300W?
Not reliably. The Slim Tip resistor tells the laptop the adapter is underpowered, so it may keep the battery topped up at idle but won't charge while you're using the machine — and under a gaming load it can't keep up at all. For a 300W Legion, use a 300W or higher adapter. Going up works; going down doesn't.
Can I use a 300W charger on a Legion that came with 230W?
Yes, that's fine. The laptop only draws the current it needs, so the extra headroom is harmless and the brick often runs cooler. Lenovo's own community staff confirm a 300W adapter on a 230W Legion 5 causes no problems. Just keep the same 20V Slim Tip connector.
Why won't my lower-watt charger work even though it fits?
Because fitting and powering are two different things. Every Legion uses the same Slim Tip, so a smaller adapter plugs in fine. The center pin carries a resistor that reports wattage, and if it's too low, the laptop refuses to run or charge from it. That's by design, not a defect.
Can I charge a Lenovo Legion over USB-C?
Newer Legion models can take a charge through the rear USB-C port using USB-C Power Delivery, which is great for light use — browsing, video, email. It won't supply enough for gaming or heavy applications, so the battery will drain under load even while plugged in. Treat USB-C as a travel backup, not a replacement for the Slim Tip brick.
Does a Legion charger work with a ThinkPad?
Often yes. Lenovo uses the same Slim Tip across Legion, ThinkPad workstations, and many IdeaPads, so a Legion adapter can power a ThinkPad P-series — provided the wattage meets what that machine needs. The resistor check still applies, so match or exceed the required power.
Next step
For Legion it really is this short: the connector is always the 20V Slim Tip, so just match or beat the wattage on your old brick and you're done. The resistor inside handles the rest. Read your label, then grab the replacement:
Shop the 330W Legion-compatible charger →
For the broader logic of voltage, amperage, and connectors across every brand, see our complete laptop charger buying guide. We've also got dedicated guides for Acer Predator & Nitro and ASUS ROG if you own one of those too.
Brand and model names on this page are used solely to describe product compatibility and do not indicate any affiliation with Lenovo Group Ltd. Always verify the required wattage against your laptop's original adapter before purchasing.
