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Battery Maintainer

Battery Maintainer

The author found that a long-neglected gel battery in a hand-held vacuum cleaner had gone high-resistance. It took some effort to make it usable again, by alternately applying voltages of opposite polarities to it. A reverse voltage can help to break down the internal non-conducting layers which can form when the battery is left idle. The battery is now back in action and charging and discharging as normal.

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