4S 18650 Li-po Lithium Battery Capacity Indicator Module

The 4S 18650 Li-po Lithium Battery Capacity Indicator Module shows how much charge is left in a four-cell (4S) lithium battery pack, such as four 18650 cells in series. Connect it across the pack and its level display gives a quick reading of the remaining capacity, so you know when to recharge before the battery runs flat. It is a simple add-on for power banks, robots, portable speakers and other DIY battery projects.

Lithium Battery Capacity Indicator Specifications

• Battery type: 4S lithium (Li-ion or Li-po), four cells in series
• Pack voltage: 14.8 V nominal, 16.8 V when fully charged
• Typical cells: 18650 Li-ion cells
• Function: shows remaining capacity based on the pack voltage
• Connection: battery positive (+) and negative (−)

Lithium Battery Capacity Indicator Applications

• Charge display for DIY 4S 18650 battery packs
• Robots, smart cars and RC models running on 4S batteries
• Portable speakers, amplifiers and LED lights
• Solar and backup battery projects

What's in the Box

• 1 × 4S lithium battery capacity indicator module

Tip: Use it only on a 4S pack (16.8 V maximum); a pack with more cells can damage it. Observe polarity when wiring, and check the level with the load switched off, because the pack voltage drops under heavy load and the display then reads low.

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