Replacement Battery for Truedio RF Headsets - Model: TD-RFBATT Purchase Includes: 1 Truedio Replacement Lithium-Ion Battery - Model: TD-RFBATT Compatible with Truedio RF Models: TD-210RF & TD-220RF Battery Life: Up to 12 Hours of Use per charge (Lasts approximately 500+ Charges) Charge Time: Approximately 3 Hours 30 Day Warranty