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*** Instructions ***
Charge fully the tested battery
Start Arduino
Put the battery into its holder (housing)
Wait until the test ends: battery capacity is displayed
After testing, recharge the battery ASAP

*** Concept ***
A load is connected to the battery and the current is measured.
When the test ends the battery is disconnected from the load automatically.
The capacity is calculated as a summation of all currents measured.
Battery capacity can be shown in 2 ways (both can be used together):

1. 7 segment display
   The display shows the battery capacity as testing is in progress (right dot flickers)
   Upon testing end, the word "End" and the battery capacity will appear alternately
   Pressing the button shows the battery voltage during testing
2. Serial monitor
   Arduino compiler's serial monitor (in Tools menu) can be used. Baud rate is 115,200.
   Data is presented in CSV format, containing:
3. Time (seconds)
4. Time (minutes)
5. Battery Voltage (mV)
6. Battery Current (mA)
7. Battery Capacity (mAh)
   Data can be saved to a CSV file using Notepad for further analysis by Excel
   When "Finished" appears, the line before it shows the battery capacity

*** Prerequisites ***
Build the Arduino extension board (with or without the 7 segment)
Connect the extension board to Arduino
Upload the .ino software to Arduino

*** Q&A ***
Q: "Battery voltage too high!" or "Volt:2 HI" is displayed
A: Make sure the Arduino board is powered (from USB or power supply)
This is caused by an over voltage at A1 input (battery voltage)

Q: "Overload!" or "OVER:LOAD" is displayed
A: Verify the extension board is assembled correctly
This is caused by an over voltage at A0 input (discharge current)

Q: "No battery detected!" or "No:batt" is displayed
A: Connect a battery (1.2V or 3.7V) to the battery holder

Q: "Battery removed!" or "No:batt" is displayed
A: Battery was disconnected during the test. Reconnect it

Q: Why does Batterino show "End" a short time after the test starts?
A: The battery might be exhausted. Check the following:

• Verify the battery is fully charged
• Replace the battery with another fully charged battery

*** Caution ***
Batteries are source of power, use them carefully:
Use only rechargeable batteries.
Do NOT short circuit batteries.
Do NOT connect batteries in reverse polarity.
Do NOT connect more than one battery at a time.
When testing a 3.7V battery the 8 Ohm resistor gets HOT!

Please verify the extension board is assembled correctly
I'm not responsible for any damage that might happen.