Respuesta a "What indicates the battery is charged?"Just finished replacing battery. Ran it down to flashing red led. Turned it off and plugged in charger, was not charging, tested charger and charger is faulty. Looking for charger all I find are email@example.comA units for Extreme and Extreme2. The charger I was given was only 12v @ 750mA by my friend. This is somewhat perplexing in that battery is 7.4V@5000mAh. Does internal circuitry knock 19v down to 7.4v ? I dont get it??