I'm the originator of the 'LI batteries and NO customer service' thread:
While investigating my options, I came across the same batteries being sold by amazon.com. It says:
"Ridgid 18 Volt Lithium Ion Battery 130383001 - Use only with Ridgid R840091 Battery Charger"
That is my same battery number, but that is NOT my charger model. My charger is model #140276006.
They came together as a kit, so one would assume they should work together but does anyone know for sure? Could a mismatch between charger and battery be the cause of both my batteries' demise? They were only charged maybe three or four times in their short lives.