when buy a laptop battery what should take care of

So, your battery isn't what is used to be. Most everyone has been there. You can remember spending long battery summer's eves, laying on a lounger in your yard or patio, perusing eBay and looking for that next special treasure. Your battery would dutifully carry you on through the night, and you had exhausted your own energy long before it had.
But, alas, no longer.
So here you are, reading my first blog post about battery. Chances are, you found it because you ran into exactly the same scenario I described above, albeit perhaps replacing "yard" for "balcony" or "patio" for "porch." You're looking for a new battery, and you've seen the bazillion different listings on eBay for your model alone. There's all sorts of different terms. Watt-hour? More like "WHAT? Hour??" am I right?
Well, let me clue you in on some common things you'll see in listings, and you should be looking for.
1. "SAME DAY SHIP!!"
The seller ships on the same day. Nice, right? Thing is, though, they pretty much ALL say this. So, what should you look for? Location, of course! EBay requires that items are listed exactly where they ship from. Some sellers try to get around this by listing an ambiguous location. Ambiguous location = BAD. It's probably being drop-shipped from China. Not to toot my own horn here, but my listings say "Voorhees, NJ." Why do they say Voorhees, NJ? Well, because that's where they are. That's where I am. When I print a label, stick it on the Hp EV088AA battery package, and hand it to my mailman, that's where it happens. Right here in my little warehouse in Voorhees NJ. Any reputable seller with quality products would be the same (and there are a few, in addition to me *grin* )

2. "WATT-HOURS, OHMS, and SO MANY VOLTS!"
The rule of thumb here is to look at the battery you already have, and compare what it says to the specs on the listing. These should be pretty much the same. If the listing is for a high-capacity dell 700m battery, the watt-hours could be higher. Some laptops can take different voltage batteries, and if the listing shows your model computer, but the voltage is different, ask the seller. Always better safe then sorry (and without power!). If you find a listing with radically different values than the battery you already have, your best bet is to leave. Either the seller made a typo, in which case who knows how much of the listing is accurate, or the seller doesn't know what they're doing, in which case again, who knows.

3. "High-Capacity! Long-Life! Extended Life!"
These things generally mean that the battery has more cells inside than your original Sony VGP-BPL2 battery has. These batteries will give you a much longer run-time than a standard battery, but they will also most likely do something else - stick out a bit. The benefit far outweighs the consequence for people who want this type of battery, which many times are frequent travelers, mobile users such as claims adjusters, campers addicted to eBay (that's me!), and the like. Rule of thumb here: look at the pictures! If it looks different than your battery, then the above will be the case. If it looks the same as your battery, then the seller has it wrong, and it is a standard-capacity battery.

4. "Original OEM! Factory DELL BATTERY!"
If this is true, then either the battery is listed for quite a lot of money compared to after-market replacements, or the battery is used. DO NOT BUY A USED BATTERY! You will not be happy. Make sure you buy a brand-new, never-used, unopened battery from a reseller you can trust. If you can't tell from the listing, ASK! Make sure you find out exactly what you are buying. If you buy a used battery, it will go bad. Much sooner than you'd like. I promise.
 
Well, that's it for now folks. Thank you for reading my article entry! I've worked with computers for many years, and I know the laptop battery business from the inside-out. I've recently branched out into eBay sales of batteries I used to sell in-house when doing service work for clients. My batteries are, of course, very high quality and warranted both through my company and through the manufacturer.