Lithium batteries are aging.
The reasons why mobile phones charge slowly and less are generally as follows:
1, insufficient output voltage when charging: long-term through the computer and other ways of charging, if the output voltage is insufficient will cause the battery charge less and less.
2, charging with non-original charger: this may cause overcharge resulting in battery power loss.
3, network signal problems: everyone should have such an experience, in the mobile phone signal is very poor when the battery consumption is very fast. One of the reasons for the poor signal is the old SIM card problem, the old SIM card is bound to wear a lot because of perennial use, and the worn SIM card will have certain problems in signal reception, signal reception problems will lead to the mobile phone itself is often in the state of Internet search, resulting in increased battery power consumption. In the end, the battery is not durable.
4, the aging failure of the battery itself leads to a decline in capacity: the battery itself has a certain service life (normal use of cycle charge and discharge up to 500 times, with the increase of the number of capacity also decreased proportionally).