Hi, I've got 2 evo energy 6.1 batteries that I won't be using for a year, any suggestion on how to store these and charge them etc, any suggestions will be helpful

@SJB for normal NMC type Lithium cells the suggested handling is charge or discharge to 50% of SoC and then put in them in the cupboard, don't know what cell type yours had, but even LiFePO4's I would treat the same...

@SJB Google search for LiFePO4's comes up with the following...

To properly store LiFePO4 cells for future use, ensure they are at a moderate state of charge (around 50%), kept in a cool, dry place away from extreme temperatures and direct sunlight, and monitored periodically for voltage.

Here's a more detailed breakdown:

1. Charge Level:

Ideal Range:

Store LiFePO4 batteries at a charge level between 50% and 80% according to ACE Battery.

Avoid Full Charge/Discharge:

Do not store them fully charged or completely discharged, as this can negatively impact their lifespan according to ACE Battery.

Monitor:

Check the voltage periodically (every few months) and recharge to the ideal range if necessary.

2. Temperature and Environment:

Ideal Temperature: Store them in a cool, dry place with a temperature range of 15-25°C (59-77°F).

Avoid Extremes: Extreme temperatures, both hot and cold, can damage the cells.

Humidity: Low humidity is preferable to prevent corrosion according to Canada.ca.

Sunlight: Keep them out of direct sunlight, which can cause overheating.

3. Other Considerations:

Original Packaging: Store them in their original packaging or a similar protective container.

Separate Storage: If storing multiple batteries, keep them separate to prevent short circuits.

Cleanliness: Ensure the battery terminals are clean and free of debris.

Disconnect: Disconnect the battery from any loads or chargers during storage.

4. Important Notes:

Self-Discharge:

LiFePO4 batteries do experience some self-discharge over time, so periodic checks and charging are necessary.

Degradation:

Calendar aging (degradation over time) is unavoidable, but proper storage can minimize its effects according to Zitara Technologies.

Recycling:

If the batteries are spent or damaged, explore recycling options instead of disposal.