I had a bad experience with a sealed nickel-metal-hydride (NiMH) battery pack recently. The pack is used with my 2-meter FM hand held transceiver (Yaesu FT-207R); recently I found corrosion around the battery terminals in the radio as well as what appears to be electrolyte leakage around the terminals of the battery pack itself. The battery had not been used for quite a while (months or even a year or more). I'm afraid to try to charge it for fear of the thing exploding and wrecking the radio, or worse. 
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Jeff, WB8NHV
Collecting, restoring and enjoying vintage Zenith radios since 2002
Zenith. Gone, but not forgotten.
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