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°
Size : 12.3mm*10mm*4mm(very small!!!)
Weight : 0.5g(Very light!!!)