What\’s typical
Most budget-to-mid portable speakers run 6-12 hours at moderate volume. Compact models trend toward the lower end; larger ones toward the higher end.
What shortens battery life in daily use
Maximum volume drains noticeably faster than moderate listening levels, and using onboard bass-boost or party-light features (where present) adds further drain.
When it\’s a real problem, not normal wear
A sudden drop to a fraction of the original runtime, rather than a slow gradual decline over many months, is the clearer signal something\’s actually wrong with the unit.
Charging habits that help
The same general rule as other lithium-battery devices: avoid routinely running it to 0% or leaving it at 100% on the charger for extended periods.