one
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The quality of the charger is not good. In order to save time, some people buy different brands of chargers. There is no guarantee on the quality, if it is so operated, it is very easy to encounter the problem of continuous heating of the charger. In addition, the charger internal fan heater is damaged and the vent is blocked. The temperature of the charger will also rise and must be replaced immediately.
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two
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Using the wrong charger. The charger can not be used randomly. Use a 60v battery charger to charge a 48v battery.
When this happens, the quality of the charger is not good, the internal has been damaged, to replace the charger to solve the problem, this is a hardware problem, you can solve the problem by replacing the maintenance
This shows that the quality of the charger is problematic, the quality of the electronic components used is poor, it is recommended not to use the charger again, such a charger is easy to spontaneous combustion.