3S 18650 Lithium Battery Capacity Level Indicator Module with LED
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Prices updated: 13 Oct 2026
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About this product
A small display module that shows the remaining charge level of a 3-cell (3S) 18650 lithium battery pack using LED indicators. It draws only about 2–3 mA static current, so it can stay connected to the pack permanently. It suits battery-powered projects and portable devices.
Specifications
- Battery configuration
- 3S (3 cells in series)
- Cell type
- 18650 lithium
- Display
- LED level indicator
- Static current
- 2–3 mA
Frequently asked questions
How do I connect it to the pack?
Connect the module's sense leads to the pack's cell tap points (B-, B1, B2, B3) in order, following the labels on the board. Verify the cell voltages before connecting.
Can I use it with a 2S or 4S pack?
It is designed for 3S packs. For other cell counts, use a module matched to that cell count, since the tap points differ.
