Title: Only use with good batteries
Review: I had seen the poor reviews for this charger, but the plastic casing on my old charger had disintegrated after 10 years, so I had to get a new one. I had one new battery which charged up just fine. Then I put in a battery which was down to 5V and the charger lasted about 30 seconds before the light went out. The problem was the transformer which had died. I still had the transformer from my old charger, so I connected it and it charged up my old battery. The new transformer was rated at 200 mA, the old one was rated at 400 mA and was twice the size and weight. Conclusion -- only insert batteries near to 12V so as not to over load the feeble transformer.
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