48 lines
1.7 KiB
Markdown
48 lines
1.7 KiB
Markdown
## M2 Connector (P2)
|
|
|
|
There is at least two type of batteries which is installed in Helios64 board:
|
|
- Li-Ion
|
|
- Coin-type Battery (CR 1225)
|
|
|
|
### Li-Ion Battery
|
|
|
|
The Li-Ion battery is actually installed in to Helios64 caseing, but the battery is connected to the board in following connector:
|
|
|
|
|
|
|
|
The actual cell of the this Li-Ion battery is the panasonic NCR18650BD, we use 2 cell in serial configuration.
|
|
So the Li-Ion battery is rated at 2980mAh, 8.4Volt.
|
|
The time estimation to full charge this battery is 8.5 Hours.
|
|
|
|
#### Pinout of the BATT Header
|
|
|
|
|
|
|
|
|Pin |Name
|
|
|----|----------
|
|
| 1 |Thermistor
|
|
| 2 |Battery +
|
|
| 3 |Battery +
|
|
| 4 |GND
|
|
| 5 |Battery -
|
|
| 6 |Battery -
|
|
|
|
|
|
### Coin Cell Battery
|
|
|
|
The Location of coin-type battery is shown by this figure:
|
|
|
|
|
|
The battery type is CR1225, this device has diameter of 12.5mm and 2.5mm thickness.
|
|
In above figure the positive (+) polarity is heading downward to the CPU heatsink side.
|
|
This battery is used only for keep the RTC (Real Time Clock) running.
|
|
|
|
|
|
### Notes related to battery
|
|
|
|
**To Be Confirmed**
|
|
We have NOT confirmed the operaiton of the RTC without CR1225 Coin Cell Battery, even in the situation with the Li-Ion connected we have NOT the operation of RTC.
|
|
|
|
The Li-Ion battery design is not for powering device when the main AC supply is disconnected, but as the device support to perform graceful shutdown or hibernate.
|
|
Therfore if you found this device can actually turned on for a while when you push the power button, in the situation the Li-Ion battery is connected (when the main AC power disconnected), this is totally normal situation.
|
|
|