Over current protection---18650 LiFePO4 battery pack will stop charging when current over 400A(AMP) and will stop discharging when current over 600A(AMP).
Over-charge over-discharge protection---18650 LiFePO4 battery pack will stop charge when its voltage reaches 3.75V and stop discharge when its voltage reaches 2.2V.
Temperature protection---low temperature -7℃ battery protection and high temperature 70℃ discharging battery protection.
Quality Guarantee--- ISO/ FCC/ RoHS/ PSE/ CE APPROVED.
Shipping time---within 7-14 days from China Dalyelec usually. Only during Labor Day(May 1-3), National Day(October 1-5) and Spring Festival(Feb 9-18, 2021) need most extra 3-10 days. Tracking information available.