Battery: 
<br /> -3.7V 900mAh Li-ion Battery For Original SJ4000/SJ4000 WIFI action camera
<br /> -Rechargeable Lithium-Ion Battery
<br /> -Battery Capacity: 900 mAh
<br /> -Compatible with SJ4000/SJ4000 WIFI
<br /> -Use As a Spare or Replacement Battery
<br /> -Size is about 33*28*10.8mm
<br /> 
<br />Desktop Charger:
<br />Model: SJ4000 Battery Charger
<br />3.7V Li-ion Battery 900mah 3.33wh
<br />Input: AC100-240V 50/60HZ
<br />Output: DC5.0V-1A
<br />Warning: Do not disassemble!
<br />
<br />Package Included:
<br />2 x  Battery for SJ4000/SJ4000 WIFI 
<br />1 x  Desktop Charger for  SJ4000/SJ4000 WIFI