Glossary
Deep discharge
What is Deep discharge?
Discharge below the permitted end-of-discharge voltage. With lead-acid, damage begins immediately; with lithium, the battery management system usually disconnects before it gets that far.
What matters about Deep discharge in practice?
A single deep discharge can permanently cost a lead-acid battery a large part of its capacity. The most common case is not operation but lay-up: standby current over weeks without charging.
Protection comes from load shedding, which disconnects loads when a threshold is undershot — and from a state-of-charge display that makes the condition visible in the first place.
Related terms
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