Battery Maintenance & Storage

A short checklist for lithium, and the storage habits that decide lifespan.

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A short checklist for lithium, and the storage habits that decide lifespan.

The maintenance checklist

Terminals tight, enclosure ventilated, BMS log reviewed. That is the whole list for lithium.

Storage, winter and long-term idle

Store at about half charge, disconnect the loads, and avoid leaving a pack flat for months.

Maintenance & safety questions

The questions that come before an order.

How long should a lithium battery last?

A good LiFePO4 pack gives 4,000–6,000 cycles at 80% depth of discharge, which is eight to ten years of daily use. Heat, sitting at 100% and charging below freezing are what shorten it.

How do I test a battery?

Measure resting voltage first, then voltage under a known load, then internal resistance if you have the tool. A pack that holds voltage at rest but collapses under load has a bad cell group or a weak connection.

What maintenance does a lithium battery need?

Very little: keep terminals clean and tight, keep the enclosure ventilated, and review the BMS log periodically. There is no watering, no equalising and no acid to check.

Is a swollen battery dangerous?

Yes — stop using it and stop charging it. Swelling means gas inside the cell, and the pack should be replaced rather than investigated.

How should batteries be stored?

At around 50% state of charge, in a cool, dry place, disconnected from loads. Leaving a pack flat for months is what does the damage.

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