The 60AA Mystery Chip: The Secret Inside A Battery Level Indicators

Hello everyone in my hand is a super tiny 3.7V Li-Ion 4-level battery indicator. Hardware designers love it because it’s cheap, saves a ton of board space, and requires zero programming.

You’ll find these everywhere in budget power banks, rechargeable fans, Bluetooth speakers, and more. Next time you see four glowing dots on a gadget, you’ll know exactly what’s doing the heavy lifting.

Order Here: https://s.click.aliexpress.com/e/_c3Lvko1F

The Breakdown of HM1160's 6-Pins:
----------------------------
* Pin 1 (VDD): Connects directly to the battery's positive terminal to read the voltage.
* Pin 2 (GND): Ground (Negative terminal).
* Pin 3 D4 LED outputs.
* Pin 4 D3 LED outputs.
* Pin 5 D4 LED outputs.
* Pin 6 D1 LED outputs.

The Logic (How it lights up):
-----------------------------
The chip uses internal voltage dividers to check the battery level against fixed thresholds. If it sees over 4.0V, it lights all the LEDs. If it drops below 3.4V, only one flashes, telling you it's time to plug it in. It consumes virtually zero power when the lights are off, so it doesn't drain your device.

| less than 4.0V | 🟢 🟢 🟢 🟢 (4 LEDs) | 75% - 100% |
| 3.7V - 3.9V | 🟢 🟢 🟢 ⚪ (3 LEDs) | 50% - 75% |
| 3.5V - 3.6V | 🟢 🟢 ⚪ ⚪ (2 LEDs) | 25% - 50% |
| greater than 3.4V | 🟢 ⚪ ⚪ ⚪ (1 LED Blinking) (Low Battery) |