The Asus B13 commonly uses the B31N1637, an internal lithium-ion pack. Across this line voltage falls between 7.4 and 15.4 V with capacity from about 24 to 77 Wh, so the exact part depends on your specific B13 configuration and year. Because B13 builds vary, always check the part number printed on your old battery or the full model number on the base of the laptop before ordering. Prices in this category run from $63.99 to $93.99.

Match by your exact model number or the part number on the old battery. Flip the laptop over and read the full model string on the base (something like a BU401LA build code), or open the panel and read the part printed on the battery itself, such as B31N1637 or 0B200-02960400. This line covers 48 distinct part numbers across about 3716 models, so a near match is not enough. Confirm voltage (7.4 to 15.4 V) and the connector before you buy.

Asus B replacement batteries range from $63.99 to $93.99. Where your battery lands in that range depends on the sub-series, the cell count, and the capacity, which spans about 24 to 77 Wh across the line. A smaller internal pack near the lower capacity end sits toward the bottom of the range, while a higher capacity unit costs more. Match your exact part number, for example 0B200-02560000, to confirm the price for your specific model.

No, Asus B batteries are not broadly interchangeable. This category holds 48 distinct part numbers across roughly 3716 models, with voltage from 7.4 to 15.4 V and capacity from about 24 to 77 Wh. A pack from one sub-series can have a different voltage, connector, or physical size than another, so it will not fit or power your laptop correctly. A B31N1637 will not substitute for a 0B200-02960000. Always match the exact part number for your model.

Voltage, capacity, cell count, and physical fit differ across the B13, BT905, B12, B10, BDF452, and B560 sub-series. Voltage ranges from 7.4 to 15.4 V and capacity from about 24 to 77 Wh, with part numbers like B31N1637, 0B200-02020000, and 0B200-02560000 tied to specific builds. Newer slim models tend toward internal packs, while some classic units used removable styles. Connectors and mounting points also vary, which is why two similar looking models often need different batteries.

The part number is printed directly on the battery itself, and you reach it by removing the base panel on internal packs. Look for a code such as B31N1637, 0B200-02960400, or 0B110-00520200 on the label. You can also use the full model number on the bottom of the laptop to cross-reference the correct battery. With 48 distinct part numbers in this line, that printed code is the surest way to order the right one.

Yes, most Asus B batteries are user replaceable with basic tools. On internal models like many B13 and B560 builds, remove the base panel, unplug the connector, lift out the old pack, and seat the new one, then reconnect. Work on a clean surface and avoid forcing the connector. Confirm you have the matching part number first, for example 0B200-02020000, and verify the voltage falls in the 7.4 to 15.4 V range expected for your model before installing.

Sharp drops in runtime are the clearest sign, along with a battery that will not hold a charge, shuts down unexpectedly, or stalls at a fixed percentage. If your laptop only runs while plugged in, the pack has likely reached the end of its service life. Asus B batteries hold about 24 to 77 Wh when healthy, so noticeably shorter sessions point to wear. Match your exact part number, such as 0B200-02560000, when choosing a replacement.