Re: how long to charge my new samsung galaxy j5 for the first time
Welcome to Android Central! Just charge it up until it's at 100%. If you want to be sure the battery is completely topped off, keep charging it for another 30 minutes or so after it hits 100%. Then use the phone normally. To keep your battery healthy, make a habit of charging up when it hits 30-40%. Avoid frequent deep discharges down to zero or the single digits--that can decrease the overall lifespan of the battery.