If the battery of your Redmi Note 5A takes a long time to charge, it discharges very quickly or even it is deformed, most likely it is damaged and it is necessary to replace it with a new one.
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At Movilone we replace the battery of your Redmi Note 5A and put a new and original one. The battery is one of the most critical components in a mobile phone or tablet and replacing it with a new one has very positive effects on the performance of the Redmi Note 5A