ON THE WAY&reg;2Pcs 2000mah ICR 14500 3.7V Rechargeable Li-ion Battery with Dual Charger Li-Ion Rechargeable 14500 with IC Protection,3.7V Warm tips:Before purchase, please make sure the battery voltage corresponds with your device voltage It is good both in low and high temperature perations Provides excellent continuous power sources to your device Holds 85% charge over 12month period