Lenovo ThinkPad models use lithium-ion batteries rated from 7.4 to 15.4 V and from about 24 to 94 Wh, built as 3-cell or 4-cell packs. The right one depends on your exact model and year, since the line spans removable older packs and sealed internal newer ones. Common part numbers across the catalog include 5B10K97617, SB10K97620, and 5B10K97645. With 110 distinct part numbers covering roughly 2189 models, you should confirm your specific ThinkPad before choosing a battery.

Find the 10-character Machine Type Model (MTM) code printed on the bottom of the laptop (for example, a code like 20XW000UUS) and match it to the correct battery. You can also check the existing battery or service panel for a part number such as SB10K97617 or 121500146. Because the catalog holds 110 part numbers across about 2189 models, matching your exact MTM is the most reliable way to land on the correct pack the first time.

Lenovo ThinkPad replacement batteries in this catalog range from $34.99 to $98.99. Where your model falls depends on capacity and cell count, since packs run from about 24 to 94 Wh in 3-cell and 4-cell configurations. Smaller batteries for compact X Series machines tend toward the lower end, while higher-capacity packs for P Series workstations sit closer to the top. Match your exact model to see the price for the part you need.

No, ThinkPad batteries are not broadly interchangeable. With 110 distinct part numbers covering roughly 2189 models and voltages ranging from 7.4 to 15.4 V, packs are shaped and rated for specific machines. For instance, a removable bridge-style pack from an older T440 will not fit a later T490s that uses an internal battery. Even within one sub-series, year and generation change the correct part, so always confirm your exact model and part number.

The main differences are capacity, cell count, and whether the pack is removable or internal. T Series workhorses and P Series workstations often carry higher-capacity packs approaching 94 Wh, while compact X Series and X1 Carbon ultraportables use slimmer packs nearer the 24 Wh end. Older sub-series models frequently used removable packs, while post-2018 designs across the line moved to sealed internal batteries. Part numbers such as 5B10K97617 and SB10K97620 map to specific models, so match yours directly.

Look on the battery itself, where the part number is printed on a label (for example, SB10K97617 or 3ICP7/38/65). On removable packs, slide the battery out to read it. On sealed internal models, you can find the matching part by looking up the 10-character MTM code on the bottom of the laptop. The catalog covers 110 part numbers, so having the exact code or printed number ensures you pick the right one.

Yes, most ThinkPad batteries are user-replaceable with basic tools. Older models with removable packs slide out with a latch and need no tools at all. Newer sealed models, such as those using part numbers like 5B10K97645, require removing the bottom cover with a screwdriver to reach the internal pack. Power down and disconnect the laptop first, then unscrew the base, unplug the battery connector, and seat the new pack. Match your exact model so the replacement fits correctly.

Common signs include rapidly dropping charge, the laptop shutting off well above 0 percent, or the system staying powered only when plugged in. You may also notice the charge capacity reading far below the original rating, which for these packs runs from about 24 to 94 Wh. If runtime has fallen sharply or the battery no longer holds a charge, it is time for a replacement. Match your exact ThinkPad model, since part numbers vary across the 110 in this catalog.