I have samsung galaxy s4 I9500.
what could be the reason that battery charge very fast and discharge also very fast.
Almost charging and discharging time reduced to 50-60%.
often, at 30-40% remaining battery my phone get power off and never turned on till recharging start. some time it start recharging it from 20-25% (phone was unable to power on until plugged into charging at this stage) and complete charge till 100% in 30-40 minutes.
Please suggest the way forward to handle this situation? is it a battery problem or a phone problem?