72Wh 61++ 01AV427 01AV425 Battery for Lenovo ThinkPad T480 T470 P51S P52S T570 T580 A485 A475 TP25 Series SB10K97584 SB10K97585 01AV490 01AV492 X50M08812 4X50M08812 01AV422 01AV423 01AV428 Review

Replacing the battery in a ThinkPad T480 sounds straightforward — and it should be. The T480's dual-battery system (one internal, one swappable external) is one of the most beloved features Lenovo ever put in a business laptop. But third-party replacements can turn that dream into a frustrating diagnostic session. Here's what you need to know before buying.

What You're Getting

This is a third-party 72Wh replacement battery — the larger "61++" external unit — designed to fit the ThinkPad T480, T470, T570, T580, P51S, P52S, A475, A485, and TP25 series. The part numbers it covers are extensive: 01AV427, 01AV425, 01AV422, 01AV423, 01AV428, SB10K97584, SB10K97585, and more. If you're cross-referencing your existing battery's label, that compatibility list is your best friend.

At 72Wh, this is the high-capacity external battery — not the smaller internal one. That distinction matters enormously for the T480 because the two batteries behave differently, charge at different rates, and are prone to different failure modes when sourced from third parties.

The Real-World Concern: Third-Party Battery Reliability

The elephant in the room is reliability. Community experience on r/thinkpad reveals a consistent pattern: third-party external batteries (like this 61++ unit) tend to perform acceptably, while third-party internal batteries are far more likely to cause charging failures. One user reported their internal replacement stopped charging beyond 22%, then drained to 0% even while plugged in — a frustrating scenario that pinhole resets and reseating couldn't fix.

The external 72Wh battery from brands like KingSener in that same order had no complaints. This suggests the 61++ external replacement category, which this product falls into, has a better track record than internal replacements. Still, "no complaints" isn't the same as a glowing endorsement.

Who Should Buy This

This battery makes sense for a specific type of buyer: someone whose original Lenovo 61++ external battery has degraded and who can't source a genuine OEM unit (Lenovo's own stock is frequently depleted). If your T480 is a few years old and running at 40-50% of original capacity, a 72Wh third-party replacement can genuinely revive the machine's all-day battery life.

It's not the right buy if you're looking to replace the internal battery. Based on available community experience, third-party internal batteries are a higher-risk proposition, and you should research that purchase separately with extra caution.

Practical Buyer Tips

• Double-check your existing battery's part number against the compatibility list before ordering — the T480 uses multiple battery variants
• After installing, let it run through at least one full charge/discharge cycle before judging capacity
• If Windows shows unusual charging behavior after install, try resetting the battery in Lenovo Vantage before assuming the battery is faulty
• Keep your receipt and check the seller's return window — if charging behaves erratically in the first week, return it promptly

The Value Equation

Genuine Lenovo T480 batteries are expensive when available, and often simply out of stock. A third-party 72Wh replacement at a fraction of the OEM price can extend the life of an otherwise solid business laptop for another two or three years. For a machine that's already paid for itself, that math usually works out. Just go in with realistic expectations: you're buying a functional replacement, not a premium product.

Frequently Asked Questions

Q: Is this battery compatible with the ThinkPad T480?

A: Yes, this is specifically designed for the T480 external (61++) battery slot, along with T470, T570, T580, P51S, P52S, A475, A485, and TP25 models. Always verify your existing battery's part number matches the listed compatibility before purchasing.

Q: Will this battery work as a drop-in replacement without any configuration?

A: In most cases, yes — it should be recognized by the system after installation. Running a full charge cycle and checking Lenovo Vantage for any battery threshold settings is recommended after installation.

Q: Is this the internal or external battery for the T480?

A: This is the external (swappable) 72Wh battery, not the smaller internal one. The T480 uses both; make sure you're replacing the correct unit.

Q: How does third-party battery reliability compare to OEM for the T480?

A: Community experience suggests third-party external (61++) batteries are generally more reliable than third-party internal ones. Reports of charging failures tend to be more common with internal replacements. That said, quality varies by brand and batch.

Q: What should I do if the battery doesn't charge properly after installing?

A: Try a pinhole reset on the laptop, reseat the battery, and check Lenovo Vantage settings. If issues persist within the return window, contact the seller — charging failures that appear immediately are likely a defective unit.

A Note on This Review

This review is based on limited sources available at the time of writing — primarily community discussions around T480 third-party battery experiences. As more direct user experiences with this specific product become available, we'll update this page with richer insights. If you've installed this battery and have feedback on capacity, charging behavior, or longevity, share your experience in the comments below — your input helps us build a better, more accurate review.

— Tech Lead Editor, CPrice