To operate, simply select the charge rate to match your battery size with the 3 position switch on the side and plug your RX or TX into the unit. Aswath damodaran applied corporate finance a users manual 4th edition.
When you plug your battery into the unit, a green charge LED light illuminates
indicating that the charger charging. The unit has a reverse polarity circuit that will protect your batteries and charger and will notify you by illuminating a red LED.
When the correct charge level is reached regardless of previous charge levels the light starts to blink. The charger will continue to monitor the batteries level until you unplug it. As soon as you unplug the battery, the unit turns off.
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To use this charger with your transmitter battery you will need to remove the its battery or jump the diode on the radio's circuit board for the charger to work correctly. This is a very simple process for someone comfortable in soldering electronics. There are the step-by-step instructions on Sirius website on how to do this. I used a piece of 30 gauge wire-wrap wire to jump the diode. This acts as a fuse just in case of a short. The charger's TX channel supports 4 to 8 cells, 250mAh to 1000mAh in size and the RX channel supports from 3-6 cells 125 mAh to 3000mAh. For all technical information and details go to http://www.siriuselectronics.com/