The TR-659 is an adapter that allows use of the TR-630 battery with GVP PAPR systems.The 3M Versaflo Batter Adapter TR 659 provides an easy to use and comfortable way for certain existing GVP PAPR users to have a power source for those systems. The adapter connects to the 3M Versaflo Standard Battery TR 630 which provides excellent run time. When combined with the Versaflo standard battery TR 630 battery and 3M Versaflo Heavy Duty Holster TR 656 for 3M Belt Mounted Powered Air Purifying Respirator GVP systems, the Versaflo battery adapter TR 659 adapter provides a durable, cleanable, power source that is easy to use and comfortable to wear.