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Simple Guidelines for Storing Batteries
  • Primary batteries store well. Alkaline and primary lithium batteries can be stored for 10 years with moderate loss capacity.
  • Remove battery from the equipment and store in a dry and cool place.
  • Avoid freezing. Batteries freeze more easily if in discharged state.
  • Charge lead acid before storing and monitor the voltage or specific gravity frequently; apply a boost if below 2.10V/cell or an SG below 1.225.
  • Nickel-based batteries can be stored for five years and longer, even at zero voltage; prime before use.
  • Lithium-ion must be stored in a charged state, ideally 40 percent. This assures that the battery will not drop below 2.50V/cell with self-discharge and fall asleep.
  • Discard Li-ion if the voltage has stayed below 2.00/V/cell for more than a week.


When charging an SLA with over-voltage, current limiting must be applied to protect the battery. Always set the current limit to the lowest practical setting and observe the battery voltage and temperature during charge.

In case of rupture, leaking electrolyte or any other cause of exposure to the electrolyte, flush with water immediately. If eye exposure occurs, flush with water for 15 minutes and consult a physician immediately.

Wear approved gloves when touching electrolyte, lead and cadmium. On exposure to skin, flush with water immediately.

Summary of Do’s and Don’ts Industry News Charging at High and Low Temperatures
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