This is not necessarily, there is no damage can be activated.
< br >
1, when the mobile phone battery is not used for a long time, 50% to 85% should be left, that is, semi-electric storage.
< br >
2, mobile phone batteries, especially the loss of the battery, the battery will self-discharge.
< br >
3, if the battery is used up, stored for a long time, the power will run out, if the battery voltage is lower than 2.75V, the battery will have irreversible damage. Higher than 2.75V, or can be activated for normal use.
< br >
4, if the battery voltage =0V, the mobile phone battery is scrapped, can not be activated. At 0V < voltage < 2.75V, it is possible to activate, but the battery capacity will be reduced, or can not be used.
< br >
5, there are many ways to activate: using the original charger to charge more than a few hours, using universal charging, using regulated voltage\/constant current power supply charging is OK.
one
Check to see if the battery is installed, and if you are sure that the battery is installed, you can proceed to the next step.
two
Check that the universal charger has added points. If there is a multimeter, you can measure whether there is an output voltage, you can check whether the indicator light of the universal charge is bright. If the indicator light is on, and there is no voltage output at the output end, it means that your universal charger has \"struck\".
three
The next step is to check if your battery is good. You can take someone else's battery and see if it can be charged. If it can charge, then your charger is good. Then there's probably something wrong with your battery.