NinjaBatt Pro HT03XL L11119-855 Battery for HP Pavilion 15 Series - Fits 14-CE/14-CF/15-DB/15-CS/15-DA/15-DW/17-by/17-CA - Replacement Laptop Battery for HP 15 Laptop - Long-Lasting Power

My laptop battery stopped charging and was losing power, despite the laptop being plugged in. I searched what to do online and did a power reset*. The battery started charging again but stopped at 99% and soon started dropping again. *Be aware there's residual power inside the laptop when unplugged and the battery is out, if performing a power reset yourself. If you are in any doubt, ask advice from an expert or pop into your local tech store, especially if you need to remove screws to do it. I searched for a replacement battery and decided to buy this one from reading previous reviews and because it has a higher capacity than my original one, which means I can use the laptop on battery power for a little longer. Note: I found it much easier to find the right battery by searching online using the code I found on the battery itself and not the battery code in System Info, as advice online suggested. The battery arrived in a white box inside Amazon packaging, sufficiently protected by bubble wrap. It fits like a glove (although it took a little more gentle force than I'd anticipated to pop the old battery out and place the new one in) and started working straight away. It was already charged to 88% so I could have used it from the box, but I fully charged it before using it. It's holding charge and working just fine now, a few months on from when I installed it. I'm happy with my purchase and it works great, just like my original battery did from new.

Excellent does exactly what it should. I have my laptop back!

Installation was easy. I followed the instruction manual which said to complete 5 discharge / charge cycles for the battery to hold a full charge (although there was a separate piece of paper that said to do 2 discharge / charge cycles). The battery is a similar spec (2600 mAh compared to 2670 mAh) to the HP original so I would expect it to last about 4 hours in my laptop. I have a problem in that the battery test feature in the HP Support Assistant app installed in my laptop no longer works - I guess it is because the HP software does not recognise a non-HP battery. Also, the Windows battery icon does not seem to accurately show how much charge is left. It has said 6.75 hours remaining when 100% charged - which is clearly wrong. It is now saying 1.5 hours charge left at 20% charge. Again, I am guessing this is the in-built battery calibration. To re-calibrate the battery, I have seen on the HP website you should completely discharge the battery and then charge it - but the NinjaBatt instruction manual advises not to do this as this shortens the battery life. I would have given a 5* review if the laptop battery monitor was working and I could get a good Idea about how long the battery held its charge. HP have discontinued their original battery so the NinjaBatt Pro is a good alternative. If it works for the specified 1000 charge lifetime that would be great - the HP original was only specified to last for 300 charges and it failed shortly afterwards.

So far so good. Early days yet though. Installed on HP laptop to replace old original battery and this new one seems to bd holding it's charge for quite a long time, a couple of hours approximately. So far pleased with the purchase.

I've read a number of battery reviews and I kept coming back to this one. I'm not disappointed. It was well packed and looked identical to the OEM product with a quality feel and finish. Fitted perfectly without any problems that you can experience with non OEM stuff, and was delivered with 57% charge. I swear the notebook started quicker with a new battery but perhaps that's just me! If it lasts as long as the original battery I'll be more than happy for the price. Certainly recommend this product.

Works great.

Good product, been using for several months now, get some 3-4 hrs out of charge which is what I expected as laptop is 2016 so pretty old, but this gives a new lease of life (including W11 upgrade). Good battery, supplied quick and works well.

Batttery failed 11 months after install