This is a holder that supports 3-cell 21700 lithium-ion batteries.

If you are building batteries with Li-Ion / LiFePO4 21700 cells, we recommend installing these specific PCBs as they will provide greater battery life.

Features:

• Overcharge protection
• Over-discharge protection
• Maximum current protection from over-discharging
• Short circuit protection

It is recommended for use in high discharge current batteries and large batteries. When the battery provides high discharge current, it will generate a lot of heat; the battery holders will keep the individual cells separate.

For large heavy batteries, the holders can help maintain the structure of the packaging. This way, the stress will not transfer to the weld points on the nickel tabs, preventing broken weld points in the battery.

The holders are designed to stack on top of each other, allowing you to create any battery size you want.