SOURCE: i have a 18 volt dewalt patter pack that has one
same prob here, except its just one pack. mine is a 14.4 impact driver
SOURCE: my charger displayed cold/hot pack
This is indicating the battery is too hot to charge, usually after coming off the tool right after some hard work. During the charging process the battey heats up so if you charge a hot battery, thereby making it hotter, you shorten the lifespan of the battery considerably. If you are getting a hot/cold pack delay indication on the charger, it should automatically start charging once the battery has cooled down sufficently.
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