Most Asus TUF laptops use an internal lithium-ion battery rated at 11.4 V and about 48 Wh, such as the FX504GD-0181D8750H pack. TUF batteries come in 3-cell or 4-cell builds, so the precise part number depends on your model and year. An FX504 generation often uses a B31N1726 style 48 Wh battery, while newer FA506 and FX506 units commonly take a B31N1911 (48 Wh) or a larger C41N2013 (90 Wh). Check the label on your current battery to confirm the right one.

Start with your exact model name, found on the bottom case or in system settings (for example TUF A15 FA506QM), then read the part number printed on your existing battery. TUF packs begin with codes like B31 or C31, such as B31N1911 (48 Wh) or C41N1837 (76 Wh). Matching that part number is the surest way to get a compatible 11.4 V replacement, since similar-looking TUF models can use different batteries and physical sizes.

An Asus TUF replacement battery in this category is priced at $60.99. That covers the 11.4 V, roughly 48 Wh lithium-ion pack compatible with about 199 TUF models, including the FX504GD-0181D8750H reference. Because part numbers vary by sub-series, confirm your exact model and the code on your old battery so you order the correct fit rather than a similar pack that does not match your connector or case dimensions.

Not always. While many TUF packs share the 11.4 V, 48 Wh specification, the part numbers differ by sub-series and year, so a battery from one model may not fit another. For example, an FX504 generation may use a B31N1726 type, while an FX516 often takes a C41N1837 (76 Wh) and some FA506 units use a larger 90 Wh C41N2013. Connectors can look similar, but physical size and mounting differ, so always match your exact part number.

The main differences are capacity and cell count. Many TUF models run a 3-cell 48 Wh pack at 11.4 V, while higher-capacity builds use a 4-cell 90 Wh battery like the C41N2013, and slimmer models such as the FX516 often use a 76 Wh C41N1837. Some A15 and F15 units even ship with a smaller battery to leave room for a 2.5-inch drive bay, or a larger battery that fills that space. Physical size changes accordingly.

Look at the label printed on your original battery, which you can see after removing the bottom cover. Asus TUF part numbers typically start with B31 or C31, for example B31N1911 (48 Wh) or B31N1726. You can also cross-check using your full model name, such as TUF A15 FA506QM. Either the part number or the exact model lets you confirm the correct 11.4 V replacement before you buy.

Yes, in most cases. TUF batteries are internal, so you remove the bottom cover to access the pack, disconnect the cable, and swap in the matching replacement. The process is straightforward with a basic screwdriver set, but you should confirm your part number first, since a model like the FA506 may use a 48 Wh B31N1911 or a larger 90 Wh C41N2013 that differs in physical size. Power down and disconnect the laptop before opening the case.

Watch for runtime that drops well below normal, a charge that stalls or will not reach full, sudden shutdowns even when the meter shows remaining power, or the system staying tied to the charger to stay on. A worn 48 Wh, 11.4 V TUF pack may also report a much lower capacity in battery health tools than its rated value. If you see these patterns, confirm your model and part number, then order the matching replacement such as the FX504GD-0181D8750H.