CQ42 Laptop Battery

The battery is a pleasant surprise compared to other replacement laptop batteries I have purchased in the past. This one installed quickly, fit perfectly in my old laptop and worked immediately. Although it's not as big as the original 9-cell battery, this one is lasting several hours after a full charge. The fit and finish are excellent as there are no gaps around the edges where the battery meets the laptop shell, nor any wiggle or play when locked into place. I highly recommend this seller as I will be coming back for more replacement batteries soon.

This battery saved me from having to buy a new laptop. I have an HP laptop and the battery had swelled and broke the mouse. My husband used the plastic pry tool included to open up the laptop. Unfortunately my laptop would not release completely. Whether that was our inability to get it off, or the way my laptop is made, I'm not sure. We still had room to get the old swollen battery out and the new one installed. I let it drain as suggested in the instructions before the initial charge to 100%. It charges up very fast and works great. I would purchase this battery again.

Perfect fit works like new again. A great price for new battery.

To begin with, I am a retired IT field tech. My laptop is an HP 17-by0061st, roughly six years old. The current battery is definitely bad. Upon removal, I saw that it was bubbled, and the diags confirmed that it was due to be replaced. The laptop, when powered off, would reboot instead of powering down. This battery part number for the battery from the HP manual matched the part number provided here, L1119-855. However, the MwAH was higher on this part than the original battery. Nonetheless, I installed it. I had some initial boot issues on first boot. I don't know if that was related to the difference in MwAH. Once I passed that, things were fine. My shutdown issues were resolved. And the battery reaches roughly 50% depletion after more than 2 hours, which is about the same run time that I had when the laptop was new. The install manual included with the battery said to fully discharge it to 2% then do a complete recharge. On Win11 you don't have the option (With this laptop) to reach a 2% level. It automatically go into sleep at 10%. There is no way that I am familiar with to adjust that lower. However, following the built-in limitations did not prove to be an impediment. I read some reviews that said that the included screwdriver was inadequate. While I have my own tools, I did use the supplied screwdriver, and found no problem. Allow me to provide a hint on screw removal. Laptop screws are rather small, and easy to loose. Grab a bowl, and put your screws in that as you remove them. In fact, have multiple bowls to put screws from different laptop parts in (One if you have a screw for an optical drive, one for bottom screws, etc) I use left over lids from peanut jars. Two other hints. One is, don't work on the laptop next to the edge of the table. Move the laptop a foot or so away from the edge of the table. That way, if you drop a screw, there is less chance that it will fall on the floor. The other hint is that if you drop a screw, don't try to catch it. Instead, follow it with your eyes to the floor. If you try to catch it, the probability is low that you will catch it, and the odds increase that you will lose it. Especially if your floor is carpeted.

I bought this replacement battery for my HP Pavilion cs0000, and it has worked really well so far. The battery capacity is solid—it charges fully without issues and holds power much better than my old original battery. I’m getting a noticeable improvement in battery life, enough for regular browsing, work, and streaming without needing to plug in constantly. The installation was pretty simple. It comes with a small tool kit, and even though I’m not a technician, I was able to swap the battery in just a few minutes. The tools included were actually useful and made the process easier. Overall, the battery feels reliable, fits perfectly, and performs exactly as expected. For anyone with a Pavilion in this series, this has been a good replacement option

Perfect fit; no discernable difference between this and the original HP battery other than labeling. Easy install once you get the back panel off and it worked perfectly once in place.

Was very easy to install. Works good. Followed directions regarding first charge and use. Disappointed that battery only lasts about 4 hours before you have to charge.

HP didn't make changing the battery on my wife's dq-14 easy, so it was rather pleasant to have this replacement battery fit right in place and charge up normally straight out of the box. Instructions aren't included, so you'll need to find other sources for that, and the plastic tool that came with my battery is shaped like a guitar pick rather than what is shown in the product photos, so I have to deduct a star for those, but other than that I'm pretty happy with the product so far. Now of course, it hasn't even been a week yet, so I have no way of knowing what the longevity is like; but the battery has done what I've expected from it thus far. Tip: I didn't know this beforehand, and it scared the bejeebers out of me, but after installing the battery and powering up for the first time, you're (most likely) going to get a "CMOS checksum error" page displayed, along with the message that it is going to revert to factory defaults! This is after the laptop had already taken an unusually L-O-N-G time to start up. So long, in fact, that I thought the battery was defective... and then to get a CMOS error on top of that? I had visions of my wife losing all her files, you know?! If it happens to you, don't panic. It's normal. The BIOS just has to get the new hardware registered internally. It only happens the first time after installation/charging. See why I deduct a star for no instructions? Panic could have easily been averted if they had just mentioned that up front. Actually, I can't really say they didn't provide "any" instructions, just nothing useful. All they give you are the "covering our asses" safety instructions for morons (you know, like don't work on your computer while it's plugged in and those sorts of things). Anyway, back on point, a CMOS error after installing the battery is not the end of the world.