How to judge good or bad to buy new lithium batteries

How to judge good or bad to buy new lithium batteries?
The second is related to the store to buy lithium batteries, although the price is a little high, but the quality is guaranteed, save more than a day charge
1 Comparison of the size of the battery capacity. General 500mAh Ni-Cd battery or 600mAh,
Nickel-hydrogen batteries, but also 800-900mAh; lithium-ion cell phone battery capacity is generally between 1300-1400mAh, so time after fully charged lithium-ion battery is about 1.5 times using nickel-hydrogen batteries, nickel cadmium batteries 3.0 times. If you find that you have purchased a block of lithium-ion cell phone batteries no longer working hours and provisions on brochures or, it may be fake.
2 see the plastic surface and plastic material. Genuine battery wear surface evenly, using PC material, no embrittlement phenomenon; counterfeit batteries no wear face or too rough, using a renewable material, easy to rattle.
3 All genuine mobile phone batteries, the appearance should be neat, no extra burr, the outer surface has some roughness and comfortable feel; inner surface is smooth feel, the light can be seen fine vertical scratches. Cell phone battery electrode with the same width, the corresponding position marked under the battery electrodes [+], [-] mark, battery charging electrode of the same material as the insulating material and the shell, but not one.
4 For the original battery, its battery surface color texture clear, uniform, clean, no scratches and damage; battery symbol should be printed on the battery model, laptop akku type, rated capacity, standard voltage, positive and negative signs, factory name. Smooth feel to be on the phone non-blocking, elastic fit, and the hand with a good, reliable lock; hardware pieces no scratches and black hair green phenomenon. If the phone battery with the above phenomenon we buy does not comply, can initially concluded that it is fake.
5 Currently, many mobile phone manufacturers also from their own perspective, through efforts to improve the level of technology to improve fraud difficulty phones and accessories to further curb the spread of the phenomenon of parallel fake. General formal requirements of mobile phone products and accessories must be consistent in appearance. So when we bought the phone if the battery installed, you should look carefully control the color of the body and the battery pan, if the color and brightness consistency, is the original battery. Otherwise, the battery itself is dull dull, it may be fake batteries. 
If the lithium battery is not very understanding friend, buy lithium batteries under the outer case can use the following method to determine:
A look at the extent of the appearance of plump appearance, usually around 2000mAh lithium battery, relatively larger volume.
Relatively fine workmanship or packaging seemed more plump.
Second look hardness, you can hand pick-lithium Qingnie or moderate middle part, moderate hardness, without feeling the squeeze soft proof lithium batteries are relatively high-quality batteries.
Third, look at the weight, the perception about whether the battery out of the packaging weight is relatively heavy, if heavy belong to high-quality batteries.
Four of the most critical work in lithium battery charging process, the continuous discharge the battery poles about 10 minutes if not hot then prove battery protection board system ok, generally with high quality lithium battery protection board better than ordinary lithium batteries.