upgrading a battery

so i own a hp 15 N003 tx,
it has a 4 cell Li-Ion Power supply: 65 W
and gives a life of only 2 hrs these days. now i called the hp support and they said that this laptop can't be used for more than 2 hrs straight and continuous charging and using for 6-8 hrs. even an upgrade for better battery is not available for this one.

now i just found that there might be a better battery for this laptop on an online battery service.

http://www.laptopcharge.com/category/notebook+battery/hp/pavilion+15-n003tx/lhp270x.aspx#pt

but only one site said it, no one else did. even hp says its not possible.

maybe this site is a fraud or something, but that's not what i ask, iwan't to know is it safe to upgrade this laptop at all even if this battery is suiting to my needs?

should i be using this laptop for long hours?

 

HP says it's not possible because they don't offer such a battery. Battery in your notebook is located in the back and the only way to significantly increase its capacity is to introduce more cells, which in turn makes the battery larger and it sticks out of the back and raises the back of the notebook.

The description of the battery in the link you have provided indeed mentions that "The battery will protrude out the (bottom/side) of the laptop and will cause your laptop to sit at an angle."

While I can't say that this battery is genuine, it is plausible that it is.

 

..it usually depends on whether the cell was charged halfway before it was shipped to storage, or if the actual cells are filled and initialized before they're shipped to you. Really is no magic involved in this any longer, and it all comes from the same factory in China anyway (some exceptions, like SiO type solutions are probably made next door). Only difference between unmarked and "original" cells is that the branded ones are checked by whatever routine inspection they've deemed necessary to minimize any potential hazards. But what really matters is that the guys who send you the cells know how long they can safely be put in storage, or if they can fill the cells, or check the cells inside the plastic coat individually (and change the ones that have a too low charge) themselves before shipping. So if you can guess approximately how long the cell you're buying has been in storage, buying these unmarked non-standard cells that presumably was officially made by crying little boys chained to cages - isn't really that much of a risk.

By the way - isn't that hp thing of your supposed to use a low-watt intel processor...? So even if the battery was broken it should probably last a bit longer than 2 hours on nominal loads.

 

Sure, but it's listed as 65Wh, same as your current battery pack. Might be an error, but it could be true as well; smaller capacity cells (= cheaper). Since it's listed as 14.8V that means there's 4 cells in series (4x 3.7V = 14.8V). That would necessitate an 8-cell battery pack; twice the Amperes, but the same voltage the motherboard expects. Now, while the size 18mm x 650mm) and voltage (3.7V) of the individual cells may be identical, that does not apply to their capacity as well:

Spoiler: Battery test 18650, Summary for all tested batteries (lygte-info.dk)

Knowing the pack's capacity, voltage and/or number of cells you can calculate the individual cell's capacity. These would be 4,400 mAh / 4 = 1,100 mAh per cell. This is the cheapest cell there is, whereas the highest capacity would be 3,400 mAh, so over 300% more within the same physical cell (and pack).

Code:

              current best  
voltage       14.8    14.8  V
capacity      65      201   Wh
              4392    13600 mAh
cells         4       4     x
voltage/cell  3.7     3.7   V
capacity/cell 1098    3400  mAh

It really is that simple; replace the four cells with 3,400 mAh variety and you have a 201Wh battery pack. Only disadvantage is cost ($9,- each, so $36 in total) and charging time; 3x longer, obviously. Also, barring someone selling those pre-assembled, you'd have to solder them yourself.

 

Short answer: No.

For a laptop battery that is relatively new (under 2 years old), replacing it with another battery of similar charge capacity won't change things.

The biggest difference in determining battery life is the power draw of the laptop itself, and not the charge capacity of the laptop. And between your 15W CPU, your discrete GPU, and a relatively large 15" LCD screen, you're pretty much stuck with a laptop that gets 2 hours of battery life, anyway to try to look at it.

The only alternative I see (besides getting a new laptop) is to get an external battery pack that can charge your internal laptop battery.

 

This is a 3-year old cell design ( 1,100 mAh, sold as '5,000 mAh' ) vs. a genuine Panasonic 3,400 mAh, also 3-years old:



There's a reason many photographers and flashlight people (these exist) swear by Panasonic and Sanyo (owned by Panasonic) and its various re-wrapped 'brands'. Only thing is; more expensive. Hence ' cheap laptop = cheap cells'. Though nothing stands in your way to pimp the battery pack of even a low-end HP or Toshiba.