You will also have comfort knowing it has been fitted properly by a specialist. If your 3.7 v lithium-ion battery's voltage drops to below 1.5 volts, it's dead. Many lithium-ion batteries have a small voltage of in between 3.7v-4.2 v. The minimal safe voltage is usually around 2.7 v, and the producers usually show it on the guidebook. When the batt