Sulfate ester and lithium phosphate additives form protective films on electrodes to inhibit internal resistance increase at low temperatures.
Controlling the nickel plating layer intensity ratio of iron to nickel on the battery case inner surface prevents local cell formation and leakage.
Laminar wafer alkaline cell uses staged adhesive seal to prevent electrolyte leakage.
Integrating a support arm within the battery pack resolves the trade-off between device complexity and user fatigue by enabling adjustable viewing positions.