Bought a power bank 6 months ago and it barely gives one charge now? 5 daily mistakes that kill lithium batteries — and how to avoid them.
TL;DR: Power banks die early due to 5 mistakes: (1) Draining to 0% constantly — this destroys lithium cells 3x faster. (2) Leaving it in a parked car during summer (60-70°C) — heat reduces capacity by 20% in 3 months. (3) Charging with a counterfeit charger that outputs unstable voltage. (4) Daily pass-through charging. (5) Storing it empty for months. The fix: recharge at 20%, store at 50%, and keep it away from heat.