1, if the drill is not charged, it is necessary to replace the charger, or measure whether the charger has voltage output to determine whether the charger is normal;
2, if the charger is normal, check whether the charging line is broken, or the element solder;
3, if the above checks are normal, you need to replace the battery test.
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If the battery is not used for a long time, there will be a self-discharge process, when the self-discharge is excessive, the battery voltage is lower than the battery charging voltage, it can not be charged. The electric drill battery is not charged, the reasons are generally the following: First, the charger is damaged, there is no normal voltage output. Second, the battery is damaged or aged. Third, the charging line inside the electric drill is disconnected.
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Finally, in daily life, we should pay attention to the preservation of mobile phone batteries. First, the mobile phone battery is fully charged and then stored. Second, each fully charged use, reduce the number of charges, improve battery life. Third, do not fully discharge the battery, usually less than 10% of the battery needs to be charged.
It's a bad battery. Go to the repair shop to match the battery