The following information applies to all SeaLife products using rechargeable Li-ion batteries.
1) Button cell top
2) Integrated protected circuitry
3) Minimum mAh rating of 2600
4) Minimum discharge current of 3.5A
5) Cell made in Japan by reputable brand like Panasonic/Sanyo or Samsung
Warning: Never use a damaged 18650 battery! Replace the battery if its sleeve/wrapper is cut, torn damaged in any way. The external sleeve helps to prevent short circuiting the battery. Short circuiting occurs if a metal objects makes contact with the + and – end of the battery at the same time, which will result in the battery overheating and may result in fire or explosion.
Note: Make sure to check the operational temperature limits specified for the UW light or camera that you are using. Most underwater lights and cameras include minimum and maximum operating temperature.