It depends on the exact model, because Asus EEE batteries are organized by sub-series. A 1005HA uses an A31-1005 or A32-1005 family pack, while a 900-series 901 uses an A31-901 or A32-901, and the 1008HA uses its own sealed A31-1008 or AL31-1008. These are lithium-ion in 3-cell or 6-cell configurations, and replacements in this category run from $52.99 to $64.99. Check the full model number on the bottom of your netbook before ordering.

Start with the full model number printed on the bottom of the laptop, for example Eee PC 1005HA, then read the part number on your current battery. Match both to confirm the correct fit, since the 900, 1000, and 1200 sub-series each use different part families like A32-901, A31-1005, and AL31-1201. Also note whether your pack is removable from the bottom or sealed internally, as on the 1008HA, because that changes which battery you need.

Replacement batteries in this category run from $52.99 to $64.99, depending on the sub-series and cell count. A 3-cell pack for a 1005HA and a 6-cell pack for a 1000HE fall within that range, so the exact figure depends on which model you have. Confirm your full model number and current part number first, since matching the correct A31, A32, or AL31 family pack is what determines the right price and fit.

No, they are not freely interchangeable across the line. Each sub-series uses its own part family, so an A31-1005 pack for a 1005HA does not fit a 900-series 901 that needs an A32-901, and the 1008HA uses a unique internal A31-1008 that no other model shares. Cell counts also differ between 3-cell and 6-cell versions. Always match both your full model number and the part number printed on your existing battery before buying.

The main differences are part family, cell count, and whether the pack is removable or sealed. The 900 series uses A31-901 and A32-901 packs, the 1000 series uses A31-1005, A31-1000, or B31-1000 families, and the 1200 series uses A31-1201 and AL31-1201. Most are removable from the bottom in 3-cell or 6-cell form, but the 1008HA stands out with a sealed internal battery using A31-1008 or AL31-1008. Screen size and processor generation largely drive these splits.

Look on the battery itself, where the part number is printed directly on the label, for example A31-1005 or AL31-1201. On models with removable packs, slide the battery out of the bottom bay to read it. If your model has a sealed internal battery, like the 1008HA with its A31-1008, cross-reference the full model number on the bottom of the laptop instead. Use both the model number and the printed part number to confirm the match.

Usually yes, because most Eee PC models use a removable pack that slides out of the bottom bay with a release latch, no tools required. A 1005HA with an A31-1005 pack or a 1201N with an AL31-1201 pack swaps out in seconds. The exception is the 1008HA, which uses a sealed internal A31-1008 battery that is more difficult to access and replace. Confirm whether your model is removable or internal before you start.

Common signs include much shorter runtime than the original 3-cell or 6-cell pack once delivered, the netbook shutting off suddenly even when charge is shown, the battery refusing to charge past a low percentage, or the system running only while plugged in. If your 1005HA or 1000HE no longer holds a usable charge, a replacement in the $52.99 to $64.99 range using the matching A31 or A32 family pack will restore portable use.