How to keep a pack, and a workshop, safe.
Storage conditions and fire planning
Store at partial charge in a cool, ventilated place, with a fire plan that assumes one pack.
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Handling, PPE and damaged packs
Insulated tools matter more than gloves; a damaged pack gets quarantined, not investigated.
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Maintenance & testing questions
Short answers to the ones that come up most.
How do I test a battery?
Resting voltage first, then voltage under a known load, then internal resistance. A pack that reads full at rest and collapses under load has a weak cell group or a bad connection.
What maintenance does lithium need?
Terminals tight, enclosure ventilated, BMS log reviewed. No watering, no equalising.
Is a swollen battery dangerous?
Yes — stop using and charging it, isolate it, and replace it.
How should I store a pack?
About half charge, cool and dry, disconnected from loads.
When should I replace a battery?
When the delivered capacity no longer meets the job, not when the calendar says so.