Hertzborn TRUE 1.5V MEDICAL GRADEPatented chip maintains 1.49-1.51V 72hrs+ (no drop like NiMH), prevents glucose meter errors. -30 TÜV CERTIFIED RELIABILITYPowers devices in blizzards when standard batteries fail. SUPERIOR 925mWh CAPACITYOutlasts NiMH batteries with real energy density (TÜV Report #ET2025). Hertzborn 4-PORT SMART CHARGERCharge 4 AAAs in 1.5hrs with auto-shutoff (UL/FCC certified). LIFETIME ECO SAVINGS1 Hertzborn battery = 1000 disposables, 5-year warranty.