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This intelligent electricity quantity display board is designed for monitoring the capacity of 3-series (3S) 18650 lithium battery packs. It has an integrated LED display that gives a clear visual indication of the battery's current power level.
Operation is simple: a brief press of the trigger switch activates the display, which then powers down automatically after 3 seconds to minimise drain on the battery.
It is intended for engineers, hobbyists and anyone who needs accurate and efficient monitoring of 3S 18650 lithium battery systems.
Intelligent power display: an LED level indicator.
Ultra-low static power use: static current of 2 to 3mA.
Green power indication LED: shows the module status.
Press-to-display: a short press lights the display, which turns off after 3 seconds.
Made for 3S packs: 9 to 12.6V lithium.
A capacity indicator measures the voltage of the battery pack and turns that voltage into a simple level display. Lithium cells hold a higher voltage when full and a lower voltage when empty, so voltage is a reasonable, if approximate, guide to how much charge is left.
Because voltage sags under load and recovers at rest, the most accurate reading is taken when the battery is not delivering heavy current. Use the indicator as a quick guide and rely on a proper charger or battery meter if you need exact numbers.
The module is best fitted where you can see and press it easily, such as on the side of a battery box or DIY pack.
DIY 3S 18650 battery packs
Power banks and portable power supplies
Robot and hobby project batteries
Checking charge level quickly before use
Lithium battery boxes
The module is for 3S packs and has a voltage rating of 9 to 12.6V. The LED table on the page lists these thresholds: 25% (first light) 3.1V, 50% (second light) 6.3V, 75% (third light) 9.4V and 100% (fourth light) 12.6V.
Connect it to the positive and negative of the pack with the correct polarity. The package contains one module.
Voltage rating: 9 to 12.6V
Compatibility: lithium battery (3S 18650)
Static current consumption: 2-3mA
Colour: blue
Indications: 25%, 50%, 75% and 100% LEDs
1 x 3S 18650 12V lithium battery capacity indicator module
DIY builders and hobbyists who want a simple level indicator on a 3S lithium pack.
3S 18650 lithium packs.
9 to 12.6V.
A short press of the trigger switch.
About 3 seconds.
2 to 3mA.
One capacity indicator module.
| Brand | Generic |
|---|---|
| Cell Configuration | 3S 18650 lithium |
| Color | Blue |
| Input Voltage | 9-12.6V |
| Selling unit | PCS |
