Quick Answer
EG4 batteries, a type of lithium iron phosphate battery, generally have a relatively stable performance in cold weather, with a slight decrease in capacity and increased internal resistance.
Cold Weather Capacity Loss
Lithium iron phosphate batteries like the EG4 can experience a capacity loss of around 2-3% for every 10°C (18°F) drop in temperature, with the optimal operating temperature range being between 10°C and 30°C (50°F and 86°F). For example, if a battery has a 12Ah capacity at 20°C (68°F), it might retain around 10.6-11.6Ah at -20°C (-4°F).
Cold Weather Charging and Discharging
To minimize the impact of cold weather on EG4 batteries, it’s essential to follow proper charging and discharging techniques. When charging in cold temperatures, it’s recommended to maintain a lower charge rate, typically around 1C, to prevent overcharging and potential damage to the battery. Discharging in cold temperatures can also lead to increased internal resistance, so it’s best to keep the battery discharge rate moderate and avoid deep discharging below 50% of the capacity.
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