3M PAPR, Versaflo Standard Battery TR-630, For TR-600 Powered Air Purifying Respirator, 4 Hour Charge Time or Less, 1/Case: Amazon.com: Tools & Home Improvement
3M High Capacity Battery TR-332, for Versaflo TR-300 PAPR
3M Versaflo Single Station Battery Charger Kit Tr-641N/37350 (Aad) - Walmart.com
Pack-n-Tape | 3M TR-640 Versaflo Battery Charger Cradle, for TR-600/800 Series PAPR, 1/case