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

If your ThinkPad's original battery has seen better days — and after a few years of daily use, most of them have — this 72Wh third-party replacement from the 61++ series is one of the more compelling options on the market. It covers a wide range of Lenovo ThinkPad models including the T480, T470, T570, T580, P51S, P52S, A475, A485, and TP25, and it targets the sweet spot between price and capacity.

What You're Actually Getting

This is a high-capacity internal replacement battery rated at 72Wh — that puts it in the range of Lenovo's own extended "61++" battery tier, not the baseline 24Wh or 48Wh cells that ship with budget configurations. For ThinkPad T480 owners especially, this matters a lot: the T480 supports Lenovo's unique Power Bridge system, which lets you swap the internal battery while keeping the laptop running via a hot-swappable external battery. A high-capacity internal cell like this maximizes that advantage significantly.

The part numbers it replaces are extensive: 01AV427, 01AV425, 01AV490, 01AV492, 01AV422, 01AV423, 01AV428, SB10K97584, SB10K97585, and 4X50M08812. Cross-referencing your model's original part number before purchase is still the right move, but this battery casts a wide net.

Compatibility: Wide, But Verify First

The compatibility list is genuinely broad, which is both a strength and a reason to double-check. ThinkPad batteries — especially across the T4xx and T5xx generations — can look identical but have different pinouts or firmware requirements. The safest approach: pull up your ThinkPad's original battery part number (visible under the battery or in Lenovo Vantage) and confirm it matches one of the listed numbers above before ordering.

One thing buyers should know going in: third-party batteries on some ThinkPad models will trigger a "non-Lenovo battery detected" warning on boot. This is cosmetic on most units and doesn't prevent charging, but it's worth knowing if that kind of message bothers you.

Capacity vs. the OEM Option

At 72Wh, this matches the highest-capacity genuine Lenovo 61++ battery. Real-world runtime will depend heavily on your workload and display brightness, but 72Wh in a T480 or T570 is typically enough for a full workday without hunting for an outlet. By comparison, lower-tier configurations ship with 48Wh cells, so upgrading to this capacity is a meaningful jump — not just a battery swap, but an actual upgrade in daily usability.

What to Watch For

• Firmware recognition: Some users report that Lenovo's battery health software (in Vantage or ThinkPad Setup) may show limited data for third-party cells. The battery charges and discharges normally, but detailed cycle counts may not appear.
• First-cycle calibration: As with any replacement lithium cell, run it through 2-3 full charge/discharge cycles before trusting the battery meter completely.
• Long-term capacity retention: Third-party batteries vary in how well they hold capacity after 12-18 months. Check whether the seller offers a warranty period — reputable third-party cells typically come with at least a 12-month guarantee.

Who Should Buy This

This battery makes the most sense for ThinkPad owners whose laptops are out of warranty and facing the choice between buying a pricey OEM replacement or extending the life of an otherwise solid machine for much less. The T480 in particular is one of the most repairable and user-upgradeable laptops of its generation — pairing it with a high-capacity internal battery is a natural extension of that philosophy.

If you're running a T570, T580, P51S, or P52S, the same logic applies: these are workhorses with good remaining value, and a 72Wh replacement can realistically add 2-3 more productive years of untethered use.

Power users who rely on the T480's Power Bridge setup will get the most out of this — a fat internal cell combined with an external pack is still one of the best battery solutions in laptop history.

Frequently Asked Questions

Q: Will this battery work with the ThinkPad T480's Power Bridge system?

A: Yes. The T480 supports a dual-battery Power Bridge setup, and this 72Wh internal battery is compatible with that system. It acts as the internal cell while you can still use a hot-swappable external battery simultaneously.

Q: Will there be a warning message when using this third-party battery?

A: Possibly. Some ThinkPad models display a non-OEM battery notice on boot. It's a software prompt, not a hardware limitation, and charging functionality is not affected on most supported models.

Q: How do I confirm this battery is compatible with my specific ThinkPad?

A: Check the part number printed on your existing battery or use Lenovo Vantage to look up your current battery model. Cross-reference it against the listed part numbers (01AV427, 01AV425, 01AV490, etc.) before purchasing.

Q: Is 72Wh an upgrade over my original battery?

A: It depends on your configuration. Base-model ThinkPads often ship with 48Wh batteries. If yours is a 48Wh cell, this 72Wh replacement is a genuine capacity upgrade. If you already had a 72Wh OEM cell, this is a like-for-like replacement.

Q: How long should a third-party replacement battery last?

A: Quality third-party cells typically hold up well for 12-24 months of regular use. Look for sellers offering at least a 12-month warranty as a baseline indicator of confidence in the product.

A Note on This Review

This review is based on limited sources available at the time of writing. As more user experiences become available, we'll update this page with richer insights — particularly around long-term capacity retention and real-world runtime figures across different ThinkPad models.

If you've used this battery in your T480, T470, or any other supported model, share your experience in the comments below. How many hours are you getting? Did you see the OEM warning? Your input helps us build a much better, more useful review for everyone considering this purchase.

— Tech Lead Editor, CPrice