Is your phone dying faster than usual? Here are five telltale signs it's time for a battery replacement. 1. Rapid drain — if your phone loses 20%+ in an hour of light use, the battery is degraded. 2. Unexpected shutdowns — powering off at 30% or higher indicates cell failure. 3. Swelling — a bulging back panel is a safety hazard. 4. Overheating — excessive warmth during charging signals trouble. 5. Slow charging — taking 4+ hours for a full charge is abnormal. Visit any FixCellat location for a free battery health check.