The battery is installed inside the mobile phone and in contact with the human body for a long time, due to the humidity (such as sweating, water vapor) is very large, resulting in the battery contact prone to oxidative rust, a long time and the mobile phone motherboard contact between a large current limiting resistance, will also make the charging current is insufficient, difficult to fill. Solution: Remove the battery, locate the battery contact, and place a cotton swab or pencil tip over clean toilet paper On (conditionally can use 0# sandpaper cut into small strips), clean each electric shock, until the contact reveals the brass color, if too much oxide is difficult to remove, you can use a pin or utility knife tip to remove one by one, but be careful to remove one by one, can not touch two contacts at the same time, otherwise there may be a short circuit resulting in explosion; Finally restore the battery and try charging.
two
For example, if your mobile phone battery capacity is 2000mA (that is, 2000mA), if you use a charger with an output current lower than 2000mA, you may not be able to charge for a long time, because the current is blocked by the charger
Small current charge large capacity battery can not be filled because the battery inside the electrode material and electrolyte, when the battery internal pressure is large, will produce bubbles escape from the bottom of the battery, which will reduce the electrolyte in the battery, resulting in the battery electrode material is not fully supported by the electrolyte and can not be filled.
The charging rate of small current is relatively slow, and can not effectively provide enough electrolyte supply, so it is not full.
In order to take full advantage of the chemical reaction inside the battery, battery manufacturers usually increase the mass ratio of electrode material and electrolyte in the battery, which reduces the internal resistance of the battery and improves the efficiency of the battery.
At the same time, the battery charging process also needs to pay attention to the size of the current and charging time, too large current and too long charging time are not conducive to the charging effect of the battery.
The charger generally uses the adjustable charging method, charging according to the loss of power, adjust the current, the small current is certainly not enough to charge the loss of large battery.
< br >
Generally, the current can be adjusted to one-tenth of the rated ampere-hour of the battery, such as the 105 ampere-hour battery, which can use 10 currents.