ITEM NAME:Dd08Crmb Mini Dc 5V 1A 3.7V 4.2V Li-Ion Battery Charger Board Module 18650 A1V8 Dd08Crmb Mini Dc 5V 1A 3.7V 4.2V Li-Ion Battery Charger Board Module 18650 A1V8 Product Name: DD08CRMB mini DC 5V 1A 3.7V 4.2V li-ion Battery Charger Board Module 18650 Solar Mini Lithium Battery Charger Module - Linear charging. Input voltage : DC 4.5V-8V(Recommend DC 5V) Maximum charging current : 1000MA Full charge voltage : 4.2V+-2%. Led indicator : "OK" LED is fully charged OR battery failure status indicator; "CR" LED is charge status indicator Operating ambient temperature : -40 ° to +85 ° Storage temperature : -65 ° to +125 ° Weight : 0.5g(Very light!!!) Can be used DC 5-6V power supply charger(Such as Solar panels)Charging module comes with charge-management functions, will not overcharge or over discharge Comes with rechargeable function,Will enter standby mode when fully charged.When the battery capacity is below 80%, the charging start. Applications: Battery