Lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries. Lithium-ion batteries have a fluid electrolyte and are therefore more unstable than lithium-polymer batteries, which can cause them to explode if they are dropped by an external force or if a substandard charger is used. The batteries used in many mobile phones, laptops and other portable electronic products are lithium batteries. In other words, many people have a "bomb" on their side. For safety reasons, you must pay attention to the following points when buying.

First, there is no clear indication of capacity. Batteries without a clearly marked capacity (e.g. 1000mAh or 1000mAh) are likely to be poor quality or recycled batteries. Many of the cheap batteries available on the market are made from recycled battery hearts, which are cheap but have a short life span and unstable quality, and may damage your phone if used carelessly.

Secondly, there is no guaranteed standby time. Standby time is the continuous use time after the battery is installed in the phone until the next charge. This is because of the unstable quality of the battery. Many cheap batteries are made with poor quality battery hearts, so the standby time is very short.

Third, whether to add a safety protection circuit board. Without the protection circuit board, the lithium battery will have deformation, leakage, the risk of explosion. In the vicious price cutting competition, each family seeks lower price protection circuit board, or simply omitted this device, making the market is full of lithium batteries with the risk of explosion. Consumers cannot tell from the outside whether there is a protective circuit board or not, so it is advisable to buy from a reputable supplier.