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- Neil
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I have the Techno-line BC-700 Intelligent battery charger. I put four batteries in for a charge and 3 of them showed NULL and wouldn't charge. I did a search that came up with the idea of putting them in a cheapo charger for a few minutes and then the techno-line charger will accept them and continue to re-charge them which it did. I now have them on a discharge / refresh cycle but I'm into the third day on this setting. Is this a normal length of time or am I flogging a dead horse? The batteries are only 12 months old and have been re-charged only about a dozen times.