The HP 500 uses an earlier-generation, user-replaceable rear-mounted lithium-ion battery, with part numbers such as HSTNN-IB39, HSTNN-FB39, 434045-621, and 434045-141. It is typically rated around 10.8V to 11.1V. This earlier family is frequently incompatible with the later HP 530 and HP 550 packs, so check the sticker under your battery before ordering. Our HP 500 replacement batteries are priced at $64.99.

Find the exact model number on the sticker under the battery or on the bottom casing, then match it to the correct sub-series. The HP 500 series splits into two incompatible groups: the earlier HP 500/510/520 family and the later HP 530/540/550 family. Knowing whether your current pack is 4-cell or 6-cell also helps. Confirming this matters because a HP 500 part like 434045-621 will not fit a HP 530, which uses 451545-361 instead.

HP 500 replacement batteries are priced at $64.99. That single price applies across the compatible models in this line, so your cost stays the same whether you have an earlier HP 500 or a later HP 530. Just make sure you select the battery that matches your exact sub-model and cell count, since the earlier and later families are not interchangeable despite sharing similar pricing.

No, HP 500 batteries are not fully interchangeable across the series. The lineup splits into two incompatible families: the earlier HP 500/510/520 group (part numbers like HSTNN-IB39 and 434045-621) and the later HP 530/540/550 group (part numbers like 451545-361 and HSTNN-DB51). The physical shape and latch mechanism differ between generations, so a battery from one family will not seat correctly in the other. Always match your exact model number.

The main difference is the battery design generation. The earlier HP 500, 510, and 520 models often used a flatter, wider rear-mounted pack with part numbers like HSTNN-FB39. The later HP 530, 540, and 550 models adopted a thicker, more standardized 6-cell rear-mounted battery similar to the HP Compaq 6720s style, with part numbers like 451545-361 and HSTNN-DB51. Voltage is commonly 10.8V or 11.1V across both, but the shape and latch differ.

Look on the sticker located under the battery itself, or on the bottom casing of the laptop. Slide the battery out (no tools needed) and the printed label shows the part number and voltage. You are looking for codes such as 451545-361, 484785-001, HSTNN-DB51, or HSTNN-IB39, plus a rating like 10.8V or 11.1V. Matching this number to your replacement ensures the correct fit and latch compatibility.

Yes, the HP 500 series uses a user-replaceable battery that requires no tools. The pack is rear-mounted on the bottom of the laptop and releases with a sliding latch. Power down the laptop, slide the latch to release the old battery, then seat the new one (rated 10.8V or 11.1V) until the latch clicks. Just confirm your replacement matches your exact sub-model, such as a HP 530 using 451545-361, before installing.

Common signs include much shorter runtime than when the laptop was new, the system shutting down unexpectedly even with charge remaining, or the battery no longer holding a charge at all. You may also see the operating system report a low maximum capacity well below the original 4400mAh to 5200mAh rating. If your HP 500 only runs on AC power or drains within minutes, a replacement rated 10.8V or 11.1V will restore portable use.