Signs your phone battery is dying
- PSL Tech Repair Team
- Apr 27
- 1 min read

A battery that once lasted all day can gradually lose capacity, so you barely notice until the phone starts crashing, overheating, or refusing to charge. Below are easy-to-spot clues that your phone battery is on its last legs, and how to double-check at home before booking a repair.
Rapid percentage drops
If 100 % plummets to 80 % within minutes of light use, chemical wear has reduced the pack’s usable capacity. Voltage “sag” from aged cells forces the meter to recalculate on the fly, showing big jumps and dives.
Sudden shutdowns above 20 %
Healthy lithium-ion packs supply stable voltage until they’re nearly empty; surprise power-offs at 15-30 % mean the battery’s internal impedance has climbed too high to meet peak demand.
Heat during simple tasks
Browsing or texting shouldn’t warm your phone. Excess heat during light use indicates lost efficiency: energy turns into heat instead of stored power, accelerating wear.
Battery health reading below 80 %
On iPhone, Settings ▸ Battery ▸ Battery Health & Charging flags “Service” once capacity slips under 80 %. Many Android phones reveal similar stats in their diagnostics menus; below 80% is the industry’s replacement threshold.
What to do next
PSL Tech Repair stocks genuine batteries for most models and can swap yours in under an hour, saving you from a low battery when you need it most.
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