Fogstar Energy 4000 21700 Battery

The FS4000 is a 4000mAh Lithium-Ion battery with a maximum discharge of 40A and a nominal voltage of 3.6V. It features a flat-top design and no protection.

• The description claims that Lithium-Ion batteries should not be kept loose in pockets or purses.
• The description claims that batteries should be charged on a dedicated charger and not left unattended.
• The description claims that batteries should be inspected for wrap damage and disposed of if damaged.
• The description claims that batteries should be recycled after a cycle life of 200-500 charges.
• The description claims that batteries should not be crushed, incinerated, or modified.