1S 18650 Li-po Lithium Battery Capacity Indicator Module

The 1S 18650 Li-po Lithium Battery Capacity Indicator Module shows how much charge is left in a single-cell (1S) lithium battery. Connect it across one 3.7 V 18650 Li-ion cell or a 1S Li-po pack and its indicator display gives a quick visual reading of the remaining capacity, so you know when it is time to recharge. It is a handy add-on for power banks, portable gadgets and battery-powered projects.

Lithium Battery Capacity Indicator Specifications

• Battery type: 1S (one cell) lithium-ion or lithium-polymer
• Cell voltage: 3.7 V nominal, 4.2 V when fully charged
• Compatible cells: 18650 and other single 3.7 V lithium cells or packs
• Function: shows remaining capacity based on the battery voltage
• Connection: battery positive (+) and negative (−)

Lithium Battery Capacity Indicator Applications

• DIY 18650 power banks
• Portable speakers and radios
• Battery-powered Arduino and ESP32 projects
• Checking RC and robotics battery packs
• Solar and outdoor lighting projects with a single lithium cell

What's in the Box

• 1 × 1S lithium battery capacity indicator module

Tip: Observe polarity when wiring. Because the reading is based on voltage, it drops while a heavy load is running and recovers at rest, so check the level with the load switched off for the most accurate result.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.